We must recognize what in our accepted tradition is damaging to our fate and dignity-and shape our lives accordingly.

Older men start wars, but younger men fight them.

If the bees disappear, man would have only four years of life left.

Considered logically this concept is not identical with the totality of sense impressions referred to; but it is an arbitrary creation of the human (or animal) mind.

The only rational way of educating is to be an example. If one can't help it, a warning example.

I think we have to safeguard ourselves against people who are a menace to others, quite apart from what may have motivated their deeds.

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.