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

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.

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.

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

Science makes no pretension to eternal truth or absolute truth.

When I am with you, we stay up all night.When you're not here, I can't go to sleep.Praise God for those two insomnias!And the difference between them.

Vow to always persevere through your struggles, challenges, and obstacles until you arrive at the rewarding end of them.

I was not a great communicator, but I communicated great things.

Everybody's good when they're good, darling. You don't judge a person by that. It's how they act when things aren't good that tells you who they really are.

Anyone who would rejoice to see someone else live a life of destruction is also, living an unrighteous life.

She will speculate that she didn’t fully know her husband—this will give her leverage to seek him, to come to know him. It will keep her husband “alive” in her memory—elusive, teasing.

I can be a little acerbic.

The movie business has always been like the wild-catting oil business. Everyone wants a gusher.

It is always the minorities that hold the key of progress.

It just happens in life, where you resonate with a particular artist. Or it can be a kind of food or a fashion - you discover it and it gives you a whole new lease on life.