The central Christian belief is that Christ’s death has somehow put us right with God and given us a fresh start. Theories as to how it did that are another matter.
We are told that Christ was killed for us, that His death has washed out our sins, and that by dying He disabled death itself. That is the formula. That is Christianity. That is what has to be believed. Any theories we build up as to how Christ’s death did all this are, in my few, quite secondary; mere plans or diagrams to be left alone if they do not help us, and, even if they do help us, not to be confused with the thing itself.
–C.S. Lewis, Mere Christianity, 54, 55