Only a great mind that is overthrown yields tragedy

The test and the use of man's education is that he finds pleasure in the exercise of his mind.

To delve into history entails, besides the grievance of hard work, the danger that in the depths one may lose one’s scapegoats.

Boredom and fatigue are great historical forces.

In ordinary speech the words perception and sensation tend to be used interchangeably, but the psychologist distinguishes. Sensations are the items of consciousness--a color, a weight, a texture--that we tend to think of as simple and single. Perceptions are complex affairs that embrace sensation together with other, associated or revived contents of the mind, including emotions.

After being boxed in by man and his constructions in Europe and the East, the release into space is exhilarating. The horizon is a huge remote circle, and no hills intervene.

In a large university, there are as many deans and executive heads as there are schools and departments. Their relations to one another are intricate and periodic; in fact, "galaxy" is too loose a term: it is a planetarium of deans with the President of the University as a central sun. One can see eclipses, inner systems, and oppositions.