"Bolshevism is not merely a political doctrine; it is also a religion, with elaborate dogmas and inspired scriptures. When Lenin wishes to prove some proposition, he does so, if possible, by quoting texts from Marx and Engels. A full-fledged Communist is not merely a man who believes that land and capital should be held in common, and their produce distributed as nearly equally as possible. He is a man who entertains a number of elaborate and dogmatic beliefs—such as philosophic materialism, for example—which may be true, but are not, to a scientific temper, capable of being known to be true with any certainty."
January 1, 1970
https://en.wikiquote.org/wiki/Vladimir_Lenin