Logic can often be reversed, but the effect does not precede the cause.

It is to the Riddle of the Sphinx that I have devoted fifty years of professional life as an anthropologist.

Interesting phenomena occur when two or more rhythmic patterns are combined, and these phenomena illustrate very aptly the enrichment of information that occurs when one description is combined with another.

Science sometimes improves hypotheses and sometimes disproves them. But proof would be another matter and perhaps never occurs except in the realms of totally abstract tautology. We can sometimes say that if such and such abstract suppositions or postulates are given, then such and such abstract suppositions or postulates are given, then such and such must follow absolutely. But the truth about what can be perceived or arrived at by induction from perception is something else again.

Science, like art, religion, commerce, warfare, and even sleep, is based on presuppositions.

Some tools of thought are so blunt that they are almost useless; others are so sharp that they are dangerous. But the wise man will have the use of both kinds.

Every move we make in fear of the next war in fact hastens it.