The field is the sole influence of the particle.

It is quite possible that we can do greater things than Jesus, for what is written in the Bible about him is poetically embellished.

It is the theory that decides what can be observed.

The mathematician knows some things, no doubt, but not those things one usually wants to get from him.

Whatever your problems in math are, I assure mine are greater.

When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.

Pure mathematics is, in its way, the poetry of logical ideas. ... [By seeking] logical beauty spiritual formulas are discovered necessary for the deeper penetration into the laws of nature.