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The intuitive mind is a sacred gift And the rational mind is a faithful servant.

— Albert Einstein, Theoretical Physicist

The whole of science is nothing more than a refinement of everyday thinking.

— Albert Einstein, Theoretical Physicist

You cannot conquer a free man. The most you can do is kill him.

— Robert Heinlein, American Author

Refusal to believe until proof is given is a rational position; denial of all outside of our own limited experience is absurd.

— Annie Besant, British Theosophist

A concept is a brick. It can be used to build a courthouse of reason. Or it can be thrown through the window.

— Gilles Deleuze, French Philosopher

It is no small art to sleep: for that purpose you must keep awake all day.

— Friedrich Nietzsche, German philosopher

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

— Samuel Butler, English Author

The best brains of the Nation may be found on the last benches of the Classroom

—  A.P.J.Abdul Kalam, Former Indian President

I mean, you could claim that anything’s real if the only basis for believing in it is that nobody’s proved it doesn’t exist!

— J.K.Rowling, Author

Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

— Marie Curie, Physicist and Chemist
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