Luke 13:19Meaning & Commentary from the Church Fathers

For instance, Paul received a small yet significant grain of faith from Ananias, and by cultivating this seed in his well-tended soul, he produced bountiful and enriching teachings, as noted in Acts 9:17-22, which offered shelter to those who were intellectually and spiritually elevated. This includes not only individuals from his time such as the Corinthians and Dionysius but also believers across all ages.

The mustard seed can also symbolize the Lord Himself. Though He came from humble beginnings as the son of a carpenter, which rendered Him seemingly insignificant, He transformed through His death and burial in the earth (John 12:24). Following this, He brought forth beautiful branches in the form of apostles, guiding those who previously wavered in their beliefs, like birds tossed about by the wind of error. These individuals were easily swayed due to their tendency to be misled and their lack of stability; they were akin to birds of the air, lost and searching for direction.

When Israel turned away, the command was issued to the holy apostles, instructing them to “go therefore and make disciples of all nations.” Much like a mustard seed, which is diminutive compared to other seeds but ultimately grows to great heights, providing shelter for many sparrows, so too does the kingdom of heaven—the new and sacred gospel of salvation—guide us in every good deed and in coming to know Him who truly is God in essence and reality. Initially aimed at a small group, this message blossomed rapidly, becoming a refuge for those seeking shelter, akin to sparrows, as all human endeavors are minor when measured against the majesty of God.

The law given to Moses was for the Israelites. However, since the entirety of humanity could not be saved merely by the law’s mere illustrations and its physical practices, the life-giving message of the gospel emerged, reaching across the entire world. The letter of the Mosaic law has unveiled a profound mystery, as written: “And the Lord spoke to Moses, saying, You shall make two trumpets of silver; of hammered work, you shall make them, and you shall use them for calling the congregation and for directing the movement of the camps.” Shortly thereafter, it states, “And the priests, the sons of Aaron, shall blow the trumpets, and it shall be a statute forever for your generations.” This references both the preparatory aspect of the law and the fulfillment achieved in Christ through the way of life and teachings of the gospel, which transcends mere shadows and types. Thus, the Law serves as a trumpet, and likewise, the gospel's saving announcement is reflected in its mention by the prophet Isaiah, where it states, “And it shall be in that day when the great trumpet is blown,” as indeed, the great trumpet has sounded through the voices of the holy apostles. It does not negate the first trumpet but rather continues it and encompasses it; they consistently affirm their teachings about Christ using the Law and the prophets, drawing on the testimonies of prior ages.

There were indeed two trumpets of hammered silver, signifying brightness, for every word of God radiates glory, devoid of worldly darkness; the process of hammering indicates that the heavenly and divine trumpet—including both the old and new gospels—would further progress and expand. “For at the resurrection of Christ, just as the old law was to evolve towards its spiritual understanding—as we who have attained spiritual insight in Christ proclaim it—the gospel message was to proliferate until it embraced the entire world.” The law granted the priests the authority to use trumpets to command the people; however, Christ commissioned the ministers of the new message—the holy apostles—to proclaim Him and His commands. They communicate His mystery, utilizing what could be considered two trumpets, both in preaching Him as “those who were from the beginning eyewitnesses and ministers of the Word,” while also reinforcing their sayings with true testimonies from the law and the prophets.

It is not difficult to see how the gospel message, initially small, was destined to ascend to great prominence; God foretold this through Isaiah, saying, “The earth will be filled with the knowledge of the Lord as the waters cover the sea.” The message of salvation pours forth abundantly like the ocean, and its momentum cannot be resisted. The Almighty has proclaimed this clearly through His prophet, stating, “Let justice roll down like waters, and righteousness like an ever-flowing stream.” He endows the gospel message with titles of justice and righteousness, assuring us that it will surge across the world like a flood, a torrent that cannot be restrained.

Consider the apostle’s words: “And though I have all faith, so that I could remove mountains…” (1 Cor. 13:2).

Thus, if the Kingdom of Heaven resembles a mustard seed and faith likewise presents as a mustard seed, it follows that faith embodies the Kingdom of Heaven, and the Kingdom of Heaven is faith itself. Therefore, those who possess faith possess the kingdom within them, as illustrated by: “The kingdom of God is within you” (Luke 17:21) and “Have faith in God” (Mark 11:22). Due to his immense faith, Peter received the keys to heaven, enabling him to open the door for others.

Understanding the nature of the mustard seed, let’s reflect on what this metaphor signifies. The mustard seed may appear insignificant and simple, yet when ground, it reveals its strength. Likewise, faith might seem elementary at first glance, but when it faces trials, it demonstrates remarkable power and fills those who encounter it with a sweet aroma. The mustard seed can also symbolize our martyrs, Felix, Nabor, and Victor. Their relics' discovery was reported by St. Ambrose to his sister Marcellina in June 386. In them was the essence of faith, even as they remained hidden. When persecution arose, they discarded their weapons, submitted to their fate, and, through martyrdom, spread the beauty of their testimony, enabling it to be rightly said: “Their voice went out into all the earth” (Psalm 18:5).

Faith can be fragile, sometimes suppressed, and at other times, sown. The Lord Himself embodies the mustard seed. No offense could mar Him, yet the people did not recognize Him because they had not engaged with Him like a mustard seed. He chose to be broken, prompting us to proclaim, “We are unto God a sweet savour of Christ” (2 Cor. 2:15). He allowed Himself to be crushed, as Peter noted, “The multitude throngs You” (Luke 8:45), and He desired to be sown like a seed that a man takes and plants in his garden. For Christ, too, was seized and laid to rest in the garden. There He rose again and became like a flourishing tree, as it is written, “As the apple tree among the trees of the wood, so is my beloved among the sons” (Song 2:3).

Therefore, you must plant Christ in your garden, for a garden is a space brimming with diverse flowers and fruits, allowing your virtuous works to blossom and release their fragrant essence. Christ signifies where the fruit thrives. Thus, we must sow the Lord Jesus: while in captivity, He is the seed; upon His resurrection, He becomes the tree that overshadows the earth. He is a grain when buried and a tree when exalted to heaven.

You are called to grind and sow faith alongside Christ. Faith requires grinding when we believe in His crucifixion. Paul ground faith when he stated, “And I, brethren, when I came to you, came not with excellency of speech or of wisdom, but determined to know nothing among you, save Jesus Christ, and Him crucified” (1 Cor. 2:1-2). He taught us to both grind faith and elevate it, declaring, “Wherefore henceforth know we no man after the flesh…” (2 Cor. 5:16). We sow faith when we believe in the sufferings of Christ through the Gospel and from the readings of the apostles and prophets. We sow faith when we cover it with the enriched soil of the Lord's flesh, allowing the seed of faith to spread naturally through contact with the warmth of His sacred body. Whoever believes that the Son of God became man, believes that He died for us and rose again for us. Thus, I sow faith when I scatter seeds at His burial.

Do you wish to understand that Christ is both a grain and a sown seed? Recall that “Except a corn of wheat fall into the ground and die, it abideth alone; but if it die, it bringeth forth much fruit” (John 12:24). It is accurate to reiterate what He has proclaimed. He is simultaneously a grain of wheat, strengthening humanity’s heart, and a grain of mustard seed, igniting passion within us. While both comparisons fit, He appears as a grain of wheat concerning His resurrection, as He is the Bread from heaven (John 6:33) that nourishes souls, inspires hope, and enhances love. He represents the mustard seed because the narrative of His suffering is both bitter and painful, evoking tears from its harshness and stirring agitation. When we hear and reflect upon how the Lord endured fasting and thirst, shed tears, and took punishment while urging “Watch and pray, that ye enter not into temptation” (Matthew 26:41), we are inspired to refrain from the allure of earthly pleasures. Therefore, whoever sows a mustard seed, sows the Kingdom of Heaven.

Do not scorn this mustard seed: “Which indeed is the least of all seeds; but when it is grown, it is the greatest among herbs” (Matthew 13:32). If Christ is the mustard seed, how can He be the least and yet grow? Surely, He does not increase by natural means but in the perception of those who behold Him. Do you wish to know why He appears least of all? We have observed Him, and “He had no form nor comeliness” (Isaiah 53:2). Yet behold Him in His majesty: He is more radiant than all the sons of men (Psalm 44:3). He, who once bore no form or beauty, has surpassed even the angels (Hebrews 1:4) and ascended beyond the glory of the prophets, who were regarded by feeble Israel as mere sustenance (Romans 14:2). The Bread that fortifies our hearts was first rejected and unacknowledged.

Christ is the seed because He is the seed of Abraham; the promises were granted to Abraham and his seed. It is not stated, “and to his descendants,” as if it pertains to many, but “and to thy seed,” which is Christ (Galatians 3:16). Thus, Christ is the seed, yet also regarded as the least of all seeds, for He did not enter this world with grandeur, wealth, or the encompassing wisdom of the age. Yet, like a towering tree, He unveiled the fullness of His might, prompting us to exclaim, “Under His shadow I have desired to sit down” (Song 2:3). Often, He embodies both tree and seed. He is the seed when people question, “Is not this the son of Joseph?” (Matthew 13:55). Yet, perplexed by His apparent greatness, the Jews wonder, “Whence hath this man this wisdom?” (Matthew 13:54).

Thus, in outward appearance, He is a grain, yet in wisdom, a tree whose flourishing branches provide refuge. Here rest the spiritual authorities and angels of heaven, alongside those who elevate through their virtuous acts. St. John found solace resting on the bosom of Jesus; he is nourished as a branch fed by the sap of this Tree. The branches include Peter and Paul, asserting what lies ahead (Philippians 3:13). For us, who were once far off, we have been gathered from the Gentiles, having navigated through the wilderness of this world amid the storms of evil spirits, seizing the oars of virtue. We now enter the safe harbor and tranquil refuge of their guidance, where the shadows of saints shield us from worldly heat, allowing us to thrive in safety and assurance.

Our souls, weighed down by grave sins, have escaped like a sparrow from the snare of the fowlers (Psalms 123:7) and have taken refuge in the branches of the Lord and the mountains. We, who once adhered to futile and burdensome regulations and were aimless in our existence, are now liberated through faith in Christ, unbound from the chains that constrained us. We are empowered to do good works. We possess freedom, even during feasts, provided we avoid excess, lest we indulge recklessly and become ensnared by our desires—though the law limits us, it ultimately guides us away from our passions. Grace, having abolished a lesser bondage, requires the greater. All things are permissible, yet not all are beneficial (1 Cor. 6:12). It is no small thing to misuse the freedom granted to fall under another’s dominion. Be free from the law, so you may rise above it through your virtues.

This seed, being the tiniest among all earthly seeds, grows into a plant larger than all others when nurtured, extending great branches for the birds of the air to find shelter beneath (Mark 4:31, 32). The same holds true for the act of preaching; despite the apparent weakness and lowly state of His disciples, the tremendous power within them allowed the message of the Gospel to spread across the globe.

Blessed Jerome also remarks on this theme, stating that the proclamation of the Gospel is the humblest of all teachings. Initially, it may appear implausible as it speaks of humanity and divinity, with God suffering death and the allure of the Cross. When compared to the doctrines of philosophers, with their articulate writings and complex arguments, the Gospel seed seems vastly inferior. Yet, unlike those fragile grains that wilt and fade, the seemingly small Gospel, once planted within the heart of a believer or throughout the world, takes root and flourishes into a strong tree. The kingdom of God—Christ's reign on earth, often reflected in the church—begins as a tiny, inconspicuous mustard seed but eventually grows to encompass many nations, just as the branches of a mustard tree provide haven for multitudes of birds. The mustard seed was so diminutive that it inspired the Jewish proverb, "small as a mustard seed." Unlike annual plants, it is a perennial species, attaining a grand stature where even riders on horseback can pass beneath its expansive branches, and large flocks of birds rest among its boughs.

Just as the mustard seed inherently develops into a mighty tree, or leaven permeates all the dough, the New Testament kingdom, despite its modest beginnings, is destined to extend its reach across the entire world and infuse it with its inner essence. Establishing this kingdom would not necessitate external violent upheavals or fierce conflicts, contrary to what many of His listeners may have thought. Instead, the Savior taught that the kingdom of heaven would prevail through the intrinsic power of truth, and through that power—rooted in faith and love—it would revitalize the world.

The small seed and sprawling tree serve as a powerful analogy for the gracious kingdom of Christ, which may start small amidst the world but will ultimately achieve greatness and glory as the number of believers increases. Similarly, the Kingdom of Heaven is compared to leaven, which a woman takes and hides in three measures of flour until the whole batch is leavened. In this way, the faith of Christ permeates the world and every aspect of the human spirit, imparting a life-giving force that restores, purifies, and sanctifies all it touches.