The essence of science is that it is always willing to abandon a given idea for a better one; the essence of theology is that it holds its truths to be eternal and immutable.

The scientist who yields anything to theology, however slight, is yielding to ignorance and false pretenses, and as certainly as if he granted that a horse-hair put into a bottle of water will turn into a snake.

The believing mind reaches its perihelion in the so-called Liberals. They believe in each and every quack who sets up his booth inthe fairgrounds, including the Communists. The Communists have some talents too, but they always fall short of believing in the Liberals.

The objection to Puritans is not that they try to make us think as they do, but that they try to make us do as they think.

The average woman must inevitably view her actual husband with a certain disdain; he is anything but her ideal. In consequence, she cannot help feeling that her children are cruelly handicapped by the fact that he is their father.

I believe in only one thing and that thing is human liberty. If ever a man is to achieve anything like dignity, it can happen only if superior men are given absolute freedom to think what they want to think and say what they want to say. I am against any man and any organization which seeks to limit or deny that freedom ... the superior man can be sure of freedom only if it is given to all men.

Living with a dog is easy- like living with an idealist.