Almost all new ideas have a certain aspect of foolishness when they are first produced.

That knowledge which adds greatness to character is knowledge so handled as to transform every phase of immediate experience.

Wisdom alone is true ambition's aim, wisdom is the source of virtue and of fame; obtained with labour, for mankind employed, and then, when most you share it, best enjoyed.

Youth is life as yet unblemished by much tragedy, but hardly by TV.

It is impossible to meditate on time and the mystery of nature without an overwhelming emotion at the limitations of human intelligence.

Problems are only opportunities in disquise.

Each generation criticizes the unconscious assumptions made by its parent. It may assent to them, but it brings them out in the open.