Albert Einstein -
"I am a deeply religious nonbeliever. This is a somewhat new kind of religion.
I have never imputed to Nature a purpose or a goal, or anything that could be understood as anthropomorphic. What I see in Nature is a magnificent structure that we can comprehend only very imperfectly, and that must fill a thinking person with a feeling of humility. This is a genuinely religious feeling that has nothing to do with mysticism. The idea of a personal God is quite alien to me and seems even naive."
I was taught in the past that Albert Einstein was a christian. It's wrong. He was an agnostic. He did not subscribe to the belief of a personal God.
Some people say he might be a deist or pantheist. Whatever the case, he was definitely not a christian.