The answer
By the Resurrection, salvation, which the Lord desired to accomplish by His Incarnation and Crucifixion, is fulfilled.
The Resurrection is the sign of success of God’s striving to deliver (save) man, which is why it is the “foundation stone” of our Christian Faith, and our preaching of Christ.
It is the heart of the Christian Faith and the spiritual life, and it is also the centre of our ritual arrangement. Every Sunday is a Feast of the Resurrection, and every Liturgy is a continuation of it.
The Resurrection of the Lord confirmed for us the divinity of Christ. He is risen, and did not, and will not, die. This is in contrast to all those who arose before or after Him, for death exercised its authority over them, and they died once again, in anticipation of the general resurrection.
As for the Lord, He is risen definitively, being the Lord of Life Who could not be contained by death.
Based on this understanding, believers began to despise death, because Christ trampled down death by His death. He bestows upon everyone victory over death, after He had overcome Satan, and bound Him with eternal chains in darkness.
His Holiness Pope Tawadros II
Pope Tawadros II, My Faith: A Series of Dialogues on the Creed (Coptic Orthodox Patriarchate, 2014), 113–114.

