Mark 8:15Meaning & Commentary from the Church Fathers

The Pharisees did not pursue Him for the purpose of faith, but rather to capture Him.

The Lord warned against the corrupting influence of the Pharisees' teachings, which can be likened to leaven. This leaven symbolizes the bitterness and inherent malice found in their doctrine. Those who are entrenched in wrongdoing and cannot articulate anything uplifting to resonate with their listeners embody this old wickedness; their teaching is toxic and ultimately drives followers toward mere remorse. As for the Herodians, they represented a group of modern instructors who proclaimed that Herod was the Messiah and insisted on belief in him.

The repetition of the terms see, watch, and keep signifies an amplification of this instruction. The teaching of the Pharisees, Sadducees, and Herodians is referred to as leaven. The Pharisees and Sadducees are referenced in Mark 3, while the Herodians appear in Mark 12. He likened this teaching to leaven, as if it were oxidized and spoiled.

As he was about to leave, Jesus spoke to his disciples in a mysterious manner concerning their inquiry, advising them to be cautious of the leaven of the Pharisees and Sadducees, alluding to their teachings and insincerity (Mt. 16:12; Mk. 8:15; Lk. 12:1).

Following an encounter with the Pharisees and Sadducees in the regions of Dalmanuf and Magdala, Christ crosses back to the opposite side of the sea, specifically the eastern shore, seeking to avoid the hostility of His adversaries. Upon His arrival, He instructs His disciples to be cautious of the leaven of the Pharisees, Sadducees, and the Herodians, warning them against the duplicity and moral decay represented by these groups. The disciples, however, had forgotten to bring sufficient bread, having only one loaf in the boat with them.

As Jesus boarded the boat, He felt sorrow for the hardened hearts of the Pharisees and Sadducees whom He had left behind among the crowd. This sorrow was compounded by His awareness that His chosen disciples, the apostles, despite their devotion, lacked true faith in Him. Desiring to caution them against the spiritual blindness of the Pharisees, who failed to recognize the signs of the times, He warned them, "Take heed; beware of the leaven of the Pharisees and the leaven of Herod." Since Herod Antipas was associated with the Sadducee sect, the leaven of Herod holds the same meaning as that of the Sadducees.

"Herod's leaven" refers to the influence of Herod Antipas, who is thought to have been aligned with the Sadducean sect, thus linking his leaven with that of the Sadducees mentioned in Matthew 16:6. While it may not be definitively established that Herod embraced all the doctrinal errors associated with the Sadducees, historical evidence indicates that his moral choices, his disregard for righteousness, and his skepticism about the Messiah's reign closely paralleled those of the Sadducees. Consequently, one can rightly equate the leaven of the Sadducees with that of Herod. It is possible that the Lord was addressing the leaven of the Pharisees, Sadducees, and Herod collectively. In the accounts of Matthew, the emphasis is on the Pharisees and Sadducees, while Mark highlights Herod. Regardless, the deceptive, legalistic teachings of the Pharisees, along with the skepticism of the Sadducees and Herod, as well as their distorted moral principles, represent various forms of leaven from which the Lord safeguards His followers.

After leaving the spiritually ‘incurable’ hypocrites behind, Jesus Christ returned to the boat and set sail to the opposite shore of the Sea of Galilee. The disciples, having forgotten to bring provisions, found themselves with only a single loaf of bread. In the meantime, Jesus cautioned them, warning, ‘Take heed and beware of the leaven of the Pharisees and Sadducees, and Herod’s leaven,’ as noted by the holy evangelist Mark. He was indicating the harmful teachings and superstitions of the Pharisees, the skepticism of the Sadducees, the moral depravity of the Herodians, and the corrupt lifestyles prevalent among all of them, all of which posed a spiritual danger to his unsuspecting disciples.