It is, I claim, nonsense to say that it does not matter which individual man acted as the nucleus for the change. It is precisely this that makes history unpredictable into the future.

Desired substance, things, patterns, or sequences of experience that are in some sense "good" for the organism - items of diet, conditions of life, temperature, entertainment, sex, and so forth - are never such that more of the something is always better than less of the something. Rather, for all objects and experiences, there is a quantity that has optimum value. Above that quantity, the variable becomes toxic. To fall below that value is to be deprived.

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

Language commonly stresses only one side of any interaction.

All experience is subjective.

Multiple descriptions are better than one.

Creative thought must always contain a random component.