Study and, in general, the pursuit of truth and beauty is the sphere in which we are permitted to remain children all our lives." "Study and, in general, the pursuit of truth and beauty is the sphere in which we are permitted to remain children all our lives.

Arrows of hate have been aimed at me too, but they have never hit me, because somehow they belonged to another world with which I have no connection whatsoever.

Whether or not you can observe a thing depends upon the theory you use. It is the theory which decides what can be observed.

Time and space are modes by which we think and not conditions in which we live.

I think that only daring speculation can lead us further and not accumulation of facts.

You ask me if I keep a notebook to record my great ideas. I've only ever had one.

Memory is deceptive because it is colored by today's events.