The longer mathematics lives the more abstract - and therefore, possibly also the more practical - it becomes.

I have always hated machinery, and the only machine I ever understood was a wheelbarrow, and that but imperfectly.

Nevertheless, the consuming hunger of the uncritical mind for what it imagines to be certainty or finality impels it to feast upon shadows in the prevailing famine of substance.

Euclid taught me that without assumptions there is no proof. Therefore, in any argument, examine the assumptions.

Obvious is the most dangerous word in mathematics.

The mistakes and unresolved difficulties of the past in mathematics have always been the opportunities of its future...

The only royal road to elementary geometry is ingenuity.

Even stranger things have happened; and perhaps the strangest of all is the marvel that mathematics should be possible to a race akin to the apes.

It is the perennial youthfulness of mathematics itself which marks it off with a disconcerting immortality from the other sciences.

The very basis of creative work is irreverence! The very basis of creative work is bold experimentation. There has never been a creator of lasting importance who has not also been an innovator.

Science makes no pretension to eternal truth or absolute truth.

In deep silence, raise your consciousness. Now feel the profound joy of life.

A metaphor is not an ornament. It is an organ of perception. Through metaphors, we see the world as one thing or another.

I see when men love women. They give them but a little of their lives. But women when they love give everything.

The crowning feature of the federal system is the supremacy of the judiciary over all other branches of government in matters relating to the rights of persons and property.

Every chess game is like taking a five-hour final exam.

Turning fifty ... is like flying: hours of boredom punctuated by moments of sheer terror.

In an aphorism, aptness counts for more than truth.

Vulgarity is more obvious in satin than in homespun.

If you want an active schedule, you have to husband your time so you can act on the things that are important.

I left a lot - a lot - of touchdowns on the field throughout the last two or three years.