Machines have altered our way of life, but not our instincts. Consequently, there is maladjustment.

The best life is the one in which the creative impulses play the largest part and the possessive impulses the smallest.

Whatever we know without inference is mental.

Even in the most purely logical realms, it is insight that first arrives at what is new.

When the journey from means to end is not too long, the means themselves are enjoyed if the end is ardently desired.

I consider the official Catholic attitude on divorce, birth control, and censorship exceedingly dangerous to mankind.

It appeared that after first contemplating a book on some subject, and after giving serious preliminary attention to it, I needed a period of subconscious incubation which could not be hurried and was if anything impeded by deliberate thinking.... Having, by a time of very intense concentration, planted the problem in my subconsciousness, it would germinate underground until, suddenly, the solution emerged with a blinding clarity, so that it only remained to write down what happened as if in a revelation.