Condemnation before investigation is the highest form of ignorance.

I wish to do something Great and Wonderful, but I must start by doing the little things like they were Great and Wonderful

A mathematical equation stands forever.

All our thinking is of this nature, a free play with concepts.

A forced faithfulness is a bitter fruit for all concerned.

A human being is a part of the whole called by us universe, a part limited in time and space. He experiences himself, his thoughts and feeling as something separated from the rest, a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty.

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.