The Catholic clergy seldom bother to make their arguments plausible; it is plain that they have little respect for human intelligence, and indeed little belief in its existence.

The great secret of happiness in love is to be glad that the other fellow married her.

A sound American is simply one who has put out of his mind all doubts and questionings, and who accepts instantly, and as incontrovertible gospel, the whole body of official doctrine of his day, whatever it may be and no matter how often it may change. The instant he challenges it, no matter how timorously and academically, he ceases by that much to be a loyal and creditable citizen of the republic.

The longest sentence you can form with two words is: I do.

The genuine music lover may accept the carnal husk of opera to get at the kernel of actual music within, but that is no sign that he approves the carnal husk or enjoys gnawing through it.

Morality is doing what is right, no matter what you are told. Religion is doing what you are told, no matter what is right.

By profession a biologist, [Thomas Henry Huxley] covered in fact the whole field of the exact sciences, and then bulged through its four fences. Absolutely nothing was uninteresting to him. His curiosity ranged from music to theology and from philosophy to history. He didn't simply know something about everything; he knew a great deal about everything.