Time is an illusion.

Only six men in the world know about relativity. I am not one of them. When I ask them to explain, they confused me.

You cannot beat a roulette table unless you steal money from it.

The health of society thus depends quite as much on the independence of the individuals composing it as on their close political cohesion.

There is no greater satisfaction for a just and well-meaning person than the knowledge that he has devoted his best energies to the service of the good cause.

A perfection of means, and confusion of aims, seems to be our main problem.

The most valuable thing a teacher can impart to children is not knowledge and understanding per se but a longing for knowledge and understanding, and an appreciation for intellectual values, whether they be artistic, scientific, or moral. It is the supreme art of the teacher to awaken joy in creative expression and knowledge. Most teachers waste their time by asking questions that are intended to discover what a pupil does not know, whereas the true art of questioning is to discover what the pupil does know or is capable of knowing.