“The cup for which Christ prayed is the cup of God's wrath, the cup of curse that falls on sinners. And the innocent voluntarily drinks the cup of the curse, becomes cursed himself, receives punishment as a sinner for the sins of others. Replacing the guilty by innocent is the heart of Christianity. People do not represent a normal picture of forgiveness of sins. The Epistle to the Hebrews says that we have a guarantee - Christ himself died for us, He is the guarantee of forgiveness of our sins. At the sermon, we should focus on this. Many people say that everything is easy for the Orthodox: he sinned, repented, forgave. We answer: yes, it's easy for us, because the Innocent takes our punishments. He redeemed the Jews from the oath of the law, the pagans from what they did against conscience”
~Dogmatic Theology, Hieromartyr Daniel Sysoev (Lecture 16: On Redemption)