Knowledge is like money: to be of value it must circulate, and in circulating it can increase in quantity and, hopefully, in value.

I never think of the future - it comes soon enough.

Laughter is the closest distance between two people.

Even the knowledge of my own fallibility cannot keep me from making mistakes. Only when I fall do I get up again.

Consistency is the last refuge of the unimaginative.

We are drowning in information but starved for knowledge.

Real knowledge is to know the extent of one's ignorance.

Better keep yourself clean and bright; you are the window through which you must see the world.

Life consists not in holding good cards but in playing those you hold well.

It is harder to conceal ignorance than to acquire knowledge.