If the book be false in its facts, disprove them; if false in its reasoning, refute it. But, for God's sake, let us freely hear both sides, if we choose.

Be polite to all, but intimate with few.

There is nothing more unequal than the equal treatment of unequal people.

His [Calvin's] religion was demonism. If ever man worshiped a false God, he did. The being described in his five points is ... a demon of malignant spirit. It would be more pardonable to believe in no God at all, than to blaspheme him by the atrocious attributes of Calvin

Never was so much false arithmetic employed on any subject, as that which has been employed to persuade nations that it is in their interest to go to war.

Among the sayings and discourses imputed to him (i.e. Jesus) by his biographers, I find many passages of fine imagination, correct morality, and of the most lovely benevolence; and others again of so much ignorance, so much absurdity, so much untruth, charlatanism, and imposture, as to pronounce it impossible that such contradictions should have proceeded from the same being.

Every generation needs a new revolution.