Because ideas have to be original only with regard to their adaptation to the problem at hand, I am always extremely interested in how others have used used them.

To do much clear thinking a person must arrange for regular periods of solitude when they can concentrate and indulge the imagination without distraction.

Nature is what we know. We do not know the gods of religions. And nature is not kind, or merciful, or loving. If God made me - the fabled God of the three qualities of which I spoke: mercy, kindness, love - He also made the fish I catch and eat. And where do His mercy, kindness, and love for that fish come in? No; nature made us - nature did it all - not the gods of the religions.

My success is due more to my ability to work continuously on one thing without stopping than to any other single quality.

The Bible of nature is the best damn Bible in the world. Its laws are perfect and grand, and all the prayers in the world can't change them. There is intelligence and law in this world, and there may be supreme intelligence and law, but so far as the religion of the day is concerned, it is all a damned fake.

I do not believe in the God of the theologians; but that there is a Supreme Intelligence I do not doubt.

The inventor tries to meet the demand of a crazy civilization.