Obsession is the wellspring of genius and madness.

A good teacher protects his pupils from his own influence.

We thought that we had the answers, it was the questions we had wrong.

Think globally, act locally.

Never pick a fight with an ugly person, they've got nothing to lose.

True knowledge lies in knowing how to live.

All great achievements require time.

I've come to believe that all my past failure and frustration were actually laying the foundation for the understandings that have created the new level of living I now enjoy.

I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.

We are all born ignorant, but one must work hard to remain stupid

One of the truest tests of integrity is its blunt refusal to be compromised.

Convictions are more dangerous enemies of truth than lies.

A house divided against itself cannot stand.

How often it is that the angry man rages denial of what his inner self is telling him.

Not everything that can be counted counts, and not everything that counts can be counted.

Knowledge speaks, but wisdom listens

Simplicity is the ultimate sophistication.

One who deceives will always find those who allow themselves to be deceived.

One must wait until the evening to see how splendid the day has been.

As our case is new, we must think and act anew.

Creativity is the greatest rebellion in existence.