"The question is whether there can be any progress of the mind in a secular world. That is to say, if we turn away from the ethical teachings of Christ, or for that matter Muhammad, what is left to guide us? What incentive do we have to be good if there is no afterlife? The problem that militant atheists confront, including recent popularisers of atheism like Richard Dawkins and Christopher Hitchens, is that there isn’t really a very good answer to that."
January 1, 1970
https://en.wikiquote.org/wiki/Richard_Dawkins