One of the amazing things I experienced when passing from atheism to theism was how easy it became to accept and understand ideas that I had earlier found unacceptable and absurd. Had I, as many of my atheist friends accused me, lost my mind? Also, why was I suddenly drawn to protect with all my heart and mind that which I had recently attacked with full vigor?
Salvation as described in the Bible seemed silly to me as an outsider (a non-Christian). However, after becoming an insider (a Christian) I found that salvation made more sense than anything I had ever known.
C.S. Lewis, also a former atheist, explained it this way.
“There are certain things in Christianity that can be understood from the outside, before you have become a Christian. But there are a great many things that cannot be understood until after you have gone a certain distance along the Christian road. These things are purely practical, though they do not look as if they were. They are directions for dealing with particular crossroads and obstacles on the journey and they do not make sense until a man has reached those places.” (C.S. Lewis, Mere Christianity, HarperOne Edition, 2001, p. 144)
What makes the difference? One minute you are lost, the next minute you are saved – from death to life in a fraction of a second. How can we explain that change to someone who has not experienced that change? And how do you explain all the things you learn during your journey as a Christian? I believe strongly in things I once thought ridiculous and laughable. There must be a way to communicate these spiritual things in ways that non-believers can see as possible.