I do not see how a man can work on the frontiers of…

I do not see how a man can work on the frontiers of physics and write poetry at the same time. They are in…

— Paul Dirac

I cannot remember a time in opposition - I am talking about the last four years - when we have done less work on…

— Kenneth Clarke

A monkey is unaware that atoms exist. Likewise, our brainpower may not stretch to the deepest aspects of reality. The bedrock nature of space…

— Martin Rees

I learnt to distrust all physical concepts as the basis for a theory. Instead one should put one's trust in a mathematical scheme, even…

— Paul Dirac

What makes the theory of relativity so acceptable to physicists in spite of its going against the principle of simplicity is its great mathematical…

— Paul Dirac

Liberty has restraints but no frontiers.

— David Lloyd George

The frontier of America is on the Rhine.

— Franklin D. Roosevelt

The frontiers we broke into in the '60s are still largely unexplored.

— Ken Kesey

Up to the 20th century, we can say that this whole period was an Earth epoch, 'Earth' meaning the riches of the earth, simple…

— Lech Walesa

If he were allowed contact with foreigners he would discover that they are creatures similar to himself and that most of what he has…

— George Orwell

Fuehrer, we are on the march! Victorious Italian troops crossed the Greco-Albanian frontier at dawn today!

— Benito Mussolini

I believe that the manned space program can engage the public by advancing the space frontier. Every next mission takes you farther out in…

— Neil deGrasse Tyson

In Russia there is an emigration of intelligence: émigrés cross the frontier in order to read and to write good books. But in doing…

— Friedrich Nietzsche

Melissa McCarthy just opened this new movie, 'Identity Thief,' and Rex Reed, who's a known critic, wrote a scathing commentary on her weight. I…

— Josh Gad

I just think music is one of those frontiers where people really want the "I" to be you.

— Regina Spektor