The resurrection.

[Hadji]

I believe in Our Lord's Resurrection is because when a handful of eye-witnesses to this historical event were asked to stop preaching the risen Christ & deny the Resurrection

What are your sources?

Because Christ's Resurrection has a purpose. if Jesus didn't rise from the dead, you & I wouldn't be able to enter Heaven.

Actually, if Christ wasn't raised from the dead, we'd technically be bound to Jewish law. If I remember correctly, atonement was around a long way back before Christ.