What I think to be the easiest way to convince God exists and that Christianity is true

Atheist Police Detective Examines the Resurrection of Jesus becomes Christian

Lecture by acclaimed police detective J. Warner Wallace. Wallace was an atheist while rejecting the New Testament claims on the resurrection of Jesus. However, after examining the evidence of Christianity and the resurrection of Jesus, he became a born-again Christian.

This is a great video to watch if you want to know why Christianity is true in the shortest amount of time possible.