“Every man has a right to his own opinion, but no man has a right to be wrong in his facts”

“I have always strenuously supported the right of every man to his own opinion, however different that opinion might be to mine. He who denies to another this right, makes a slave of himself to his present opinion, because he precludes himself the right of changing it.”

“Every man must have the right fearlessly to think independently and express his opinion about what he knows, what he has personally thought about and experienced, and not merely to express with slightly different variations the opinion which has been inculcated in him.”

“The source of man's rights is not divine law or a congressional law, but the law of identity. A is A ___ and man is man. Rights are conditions of existence required by man's nature for his proper survival. If man is to live on earth, it is right for him to use his mind, it is right to act on his own free judgment, it is right to work for his values and to keep the product for his work. If life on earth is his purpose, he has a right to live as a rational being: nature forbids him the irrational”

“By the time a man realises that maybe his father was right, he usually has a son who thinks he is wrong.”

“Every man has a right to utter what he thinks truth, and every other man has a right to knock him down for it.”