Then he received from God the command to offer Isaac in sacrifice, while Isaac was still a child. Yet through Isaac alone the fulfillment of the promise had to come to pass.
And behold, without any objection, the father was ready to slay the boy with his own hands. At that very same time, he believed that the promise to be fulfilled through him was unshakable and true.
Do you see what justifying faith is like?
Christ also promised us the inheritance of eternal life, delight, glory, and the Kingdom.
Then He commanded us to live in poverty, to fast, to live perfectly and in constraint, to be ready for death, and to crucify ourselves with the passions and lusts.
Therefore, if we become zealous for this and believe that promise of God, then behold, we too, according to the pattern of Abraham, have believed God. This will be counted to us as righteousness.
You see what followed from this. His readiness to present Isaac for slaughter was not only a mighty testimony and manifestation of Abraham's faith.
It also became the cause that Christ would be born from his seed. Through Christ all the tribes of the earth were blessed, and the promise found its fulfillment.
For God, as it were, became a Debtor to the one who for God's sake gave his only-begotten and own son.
Thus, for his sake and because of the promise made to him, God in turn gave His Only-begotten and Own Son.
So it is also with us. Chastity and righteousness, humility and endurance of those who in some way harm us, the distribution of possessions, and the affliction of the body in fasts and vigils, all have this role.
In a word, crucifying ourselves with the passions and lusts in fulfillment of God's commandments not only reveals how truly we believe Christ's promises.
It also, so to speak, makes God in turn a Debtor to grant us eternal and unshakable life, delight, glory, and the Kingdom.
Therefore He Himself, looking upon His disciples, said, "Blessed are the poor, for yours is the Kingdom of Heaven. Blessed are those who weep. Blessed are the merciful. Blessed are those persecuted for righteousness' sake" (Mt 5:3-10; Lk 6:20-22).
And, "Woe to the rich. Woe to those who laugh. Woe to those who are full. Woe when all men speak well of you" (Lk 6:24-26).
Tell me, can one who spends his life not according to the proclaimed beatitudes, but according to those things over which the Lord laments, be considered one who believes God?
It is said, "Show me your faith by your works," and, "Who is wise? Let him show his works by a good life" (Jas 2:18; Jas 3:13).
Therefore, let the fact that we truly believe God be made manifest by our good works and by keeping God's commandments.
In other words, let it be clear that we recognize as true and unshakable His promises or threats concerning us, even though they are not yet present.
But that we believe in God in an Orthodox manner, that is, that we think beautifully, firmly, and piously concerning Him, how will this be shown to us?
By our being of one soul, one mind, and one confession with our God-bearing Fathers.
Just as truly believing God is manifested not only by resisting fleshly passions and evil snares, but also by resisting people possessed by passions, who deceive and draw others into base pleasures,
so also Orthodox belief in the one true God is manifested not only by resisting ignorance and the suggestions of the adversary.
It is also manifested by resisting impious people, who secretly plunder and drag others along into their own destruction.
The greatest help is present for both forms of faith. It comes not only from God and from the rational power given to us by Him, but also from the good angels and from God-fearing people who live according to God.