If a man is offered a fact which goes against his instincts, he will scrutinize it closely, and unless the evidence is overwhelming, he will refuse to believe it. If, on the other hand, he is offered something which affords a reason for acting in accordance to his instincts, he

Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

The greatest challenge to any thinker is stating the problem in a way that will allow a solution.

The most savage controversies are those about matters as to which there is no good evidence either way.

Everything is vague to a degree you do not realize till you have tried to make it precise.

Men are born ignorant, not stupid; they are made stupid by education.

Patriots always talk of dying for their country and never of killing for their country.