That which is most personal, is most interesting.

Our theories are wedged and controlled as nothing else is. Yet sometimes alternative theoretic formulas are equally compatible with all the truths we know, and then we choose between them for subjective reasons. We choose the kind of theory to which we are already partial: we follow 'elegenace' or 'economy'

If you can change your mind, you can change your life.

What the whole community comes to believe in grasps the individual as in a vise.

Few people have definitely articulated philosophies of their own. But almost everyone has his own peculiar sense of a certain total character in the universe, and of the inadequacy of fully to match it [to] the peculiar systems that he knows.

Whenever you're in conflict with someone, there is one factor that can make the difference between damaging your relationship and deepening it. That factor is attitude.

The deepest principle in human nature is the craving to be appreciated.