By St. Theophan the Recluse
The mind can prove the truth of the Resurrection through reason based on the scriptures, and a non-believer cannot but admit the power of its arguments, as long as a sense of truth is not yet dead in him. A believer does not need proof, because the Church of God is filled with the light of the Resurrection. Both of these indicators of truth are faithful and convincing. But counter-reasoning can spring up and contradict mind’s reason, and faith can be trampled and shaken by perplexities and doubts, coming from without and arising within.
Is there no invincible wall around the truth of the Resurrection? There is. It will occur when the power of the Resurrection, received already at baptism, begins to actively be revealed as it purges the corruption of soul and body, and establishes within them the beginnings of a new life. He who experiences this will walk in the light of the Resurrection, and anyone talking against the truth of the Resurrection will seem to him insane, like a person saying in the daytime that it is night.