"All thinking men are atheists." -Hemingway

Really?

Thomas Aquinas, Italian Catholic Priest, philosopher and theologian, extolled by James Joyce to be second only to Aristotle among Western philosophers.

Aristotle, Greek philosopher and possibly the greatest influencer of Western thought, saw God as the "Unmoved Mover".

Renee Descartes, influential French philosopher, founder of Analytical Geometry and Modern Philosophy, defender of the faith

Albert Einstein, German scientist and revolutionizer of modern Physics, reported by many friends and reputable biographers to be a believer in a literal God.
(also see en.wikiquote.org/wiki/Albert_Einstein)

Isaac Newton, British Anglican, founder of Classical Physics

Galileo Galilei, Italian Catholic, astronomer, philosopher, and mathemetician

Nicolas Copernicus, Polish Catholic, founder of Heliocentric Cosmology

Max Planck, German Protestant, Nobel Laureate in Physics for his work on thermodynamics

Louis Pasteur, Catholic, brilliant French chemist and founder of Microbology and Immunology

T.S. Eliot, British Anglican, Nobel Laureate in Literature

Gerard Manley Hopkins, British Jesuit priest, creator and innovator in poetry

C.S. Lewis, British Anglican, prolific writer, thinker, and apologist

Fyodor Dostoevsky, Russian Orthodox, founder of 20th century Existentialism and (arguably) one of the greatest novelists of all time

(indebted to www.adherents.com)

Even the famous atheist and French philosopher, Jean Paul Sartre, had his moments of clarity:

In a separate 1974 interview with Simone de Beauvoir, Sartre said that "I do not feel that I am the product of chance, a speck of dust in the universe, but someone who was expected, prepared, prefigured. In short, a being whom only a Creator could put here; and this idea of a creating hand refers to God." But immediately adds that "this is not a clear, exact idea…" (wikipedia)