The horizon of many people is a circle with a radius of zero. They call this their point of view.

It is our American habit if we find the foundations of our educational structure unsatisfactory to add another story or wing.

The bitter and the sweet come from the outside, the hard from within, from one's own efforts.

If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music.

I must try, however, as best I can, although I am very conscious of the fact that our feelings and strivings are often contradictory and obscure and that they cannot be expressed in easy and simple formulas.

Every serious scientific worker is painfully conscious of this involuntary relegation to an ever-narrowing sphere of knowledge, which threatens to deprive the investigator of his broad horizon and degrades him to the level of a mechanic.

Don't let your brain interfere with your heart.