Too many of us look upon Americans as dollar chasers. This is a cruel libel, even if it is reiterated thoughtlessly by the Americans themselves.

There is, however, one other human right which is infrequently mentioned but which seems to be destined to become very important: this is the right, or the duty, of the individual to abstain from cooperating in activities which he considers wrong or pernicious.

The finest emotion of which we are capable is the mystic emotion.

I cannot imagine a God who rewards and punishes the objects of his creation and is but a reflection of human frailty.

Teaching should be such that what is offered is perceived as a valuable gift and not as a hard duty.

But nature did not deem it her business to make the discovery of her laws easy for us.

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.