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Give me 6 hours to chop a tree, I will spend the first 4 sharpening my axe.

— Abraham Lincoln, Former US President

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

— Niels Bohr, Danish physicist

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

— CV Raman, Indian Physicist

I would rather have questions that can’t be answered than answers which can’t be questioned.

— Richard Feynman, American Theoretical Physicist

Time and space are modes by which we think and not conditions in which we live.

— Albert Einstein, Theoretical Physicist

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

— Samuel Butler, English Author

Nothing that is worth knowing can be taught.

— Oscar Wilde, Irish Poet and Playwright

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

— Mark Twain, American Writer

Everyone you meet always asks if you have a career, are married, or own a house as if life was some kind of grocery list. But no one ever asks you if you are happy.

— Heath Ledger, Actor

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

— Albert Einstein, Theoretical Physicist
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