In a living civilization there is always an element of unrest, for sensitiveness to ideas means curiosity, adventure, change. Civilized order survives on its merits and is transformed by its power of recognizing its imperfections.

The study of mathematics is apt to commence in disappointment.

The aim of science is to seek the simplest explanation of complex facts... Seek simplicity and distrust it.

Philosophy is the product of wonder.

It is in literature that the concrete outlook of humanity receives its expression.

The art of progress is to preserve order amid change, and to preserve change amid order. Life refuses to be embalmed alive. The more prolonged the halt in some unrelieved system of order, the greater the crash of the dead society.

The deepest definition of youth is life as yet untouched by tragedy.