The true definition of madness is repeating the same action, over and over, hoping for a different result.

To have a better life we must keep choosing how we are living.

The great need to grasp principles had caused me to spend most of my time on fruitless persuits.

When I have one week to solve a seemingly impossible problem, I spend six days defining the problem. Then, the solution becomes obvious.

The only source of knowledge is experience.

Anybody who really wants to abolish war must resolutely declare himself in favor of his own country's resigning a portion of sovereignty in place of international institutions.

A thought that sometimes makes me hazy: Am I - or are the others crazy?