Religion

The easy confidence with which I know another man’s religion is folly teaches me to suspect that my own is also. - Mark Twain

The fact is that more people have been slaughtered in the name of religion than for any other single reason. That, my friends, that is true perversion. - Harvey Milk

The foulest sinner of all is the hypocrite who makes a racket of religion. - Robert A. Heinlein

The greatest tragedy in mankind’s entire history may be the hijacking of morality by religion. - Arthur C. Clarke

The inhabitants of the earth are of two sorts: those with brains, but no religion, and those with religion, but no brains. - Abu’l-‘ala’ Al-Ma’arri