"I would not think that philosophy and reason themselves will be man's guide in the foreseeable future; however, they will remain the most beautiful sanctuary they have always been for the select few."
"Great spirits have always encountered violent opposition from mediocre minds."
"The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives."
"Imagination is the highest form of research."
"Teaching should be such that what is offered is perceived as a valuable gift and not as hard duty. Never regard study as duty but as the enviable opportunity to learn to know the liberating influence of beauty in the realm of the spirit for your own personal joy and to the profit of the community to which your later work belongs."
"If you can't explain it to a six year old, you don't understand it yourself."