The small wisdom is like water in a glass: clear, transparent, pure. The great wisdom is like the water in the sea: dark, mysterious, impenetrable.

We are what our thoughts have made us; so take care about what you think. Words are secondary. Thoughts live; they travel far.

The highest wisdom has but one science - the science of the whole - the science explaining the whole creation and man's place in it.

We can know only that we know nothing. And that is the highest degree of human wisdom.

Give thy thoughts no tongue.

Outsized returns come from betting against conventional wisdom, but conventional wisdom is usually right.