In teaching you cannot see the fruit of a day's work. It is invisible and remains so, maybe for twenty years.

Idealism springs from deep feelings, but feelings are nothing without the formulated idea that keeps them whole.

The truth is, when all is said and done, one does not teach a subject, one teaches a student how to learn it.

The intellectuals' chief cause of anguish are one another's works.

Look for all fancy wordings and get rid of themAvoid all terms and expressions, old or new, that embody affectation.

Boredom and fatigue are great historical forces.

Only a great mind that is overthrown yields tragedy