"The moral purpose of a man's life is the achievement of his own happiness."

"The mind is an attribute of the individual. There is no such thing as a collective brain."

"If a man is right, he has no reason to fear the judgment of others. If he is wrong, he has no reason to wish that judgment withheld."

"The only good is the good of the individual."

"The worst guilt is to accept an unearned guilt."