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The only true wisdom is in knowing you know nothing.

— Socrates, Greek Philosopher 

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

Everything must be made as simple as possible. But not simpler.

— Albert Einstein, Theoretical Physicist

Ask the right questions, and nature will open the doors to her secrets.

— CV Raman, Indian Physicist

It’s interesting that these themes of crime and political corruption are always relevant.

— Martin Scorsese, American Director

That which can be asserted without evidence, can be dismissed without evidence.

— Christopher Hitchens, Author

Maybe true travel is not the transportation of the body, but a change of perception, renewing the mind. 

— Ben Okri,  Nigerian Poet and Novelist

Natural science does not simply describe and explain nature: it is part of the interplay between us and nature.

— Heisenberg, German Theoretical Physicist

Prayers without accordant action are silent lies told to oneself, heard by no God, amounting to nothing. Action is the language of truth, the prayers of the Saints.

— Mark Ruffalo, Hollywood Actor

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

— Friedrich Nietzsche, German philosopher
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