It is the things for which there is no evidence that are believed with passion.

All the conditions of happiness are realized in the life of the man of science.

Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.

Ordinary language is totally unsuited for expressing what physics really asserts, since the words of everyday life are not sufficiently abstract. Only mathematics and mathematical logic can say as little as the physicist means to say.

Not to be absolutely certain is, I think, one of the essential things in rationality.

More important than the curriculum is the question of the methods of teaching and the spirit in which the teaching is given

The qualities most needed are charity and tolerance, not some form of fanatical faith such as is offered to us by the various rampant isms