Still more astonishing is that world of rigorous fantasy which we call mathematics.

I shall argue that the problem of grace is fundamentally a problem of integration and what is to be integrated is the diverse parts of the mind - especially those multiple levels of which one extreme is called 'consciousness' and the other the 'unconscious'

All experience is subjective.

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

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.

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 probes; it does not prove.