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Kindness is the language which the deaf can hear and the blind can see.

— Mark Twain, American Writer

To him who looks upon the world rationally, the world in its turn presents a rational aspect. The relation is mutual.

— Georg W.H. Hegel, German philosopher

An expert is a person who has made all the mistakes that can be made in a very narrow field.

— Niels Bohr, Danish physicist

Never mistake motion for action.

—  Ernest Hemingway,  American novelist

What could an entirely rational being speak of with another entirely rational being?

— Emmanuel Levinas, French philosopher

An optimist believes we live in the best possible of worlds.- A pessimist fears that this is true.

— James Branch Cabell, American Author

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.

— Isaac Asimov, American Writer and Professor

For me, I am driven by two main philosophies: know more today about the world than I knew yesterday and lessen the suffering of others. You’d be surprised how far that gets you.

— Neil deGrasse Tyson, Science Communicator

Anything that gives us new knowledge gives us an opportunity to be more rational.

— Herbert Simon,American economist

Logic is like the sword–those who appeal to it shall perish by it.

— Samuel Butler, English Author
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