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.