There's a reason the name 'Einstein' is synonymous with 'genius'. Albert Einstein was one of the greatest minds of the 20th century, and his contributions to human knowledge are unparalleled.

The physicist conducted groundbreaking research on how our Universe functions, formulated the Theory of Relativity, and predicted the existence of gravitational waves a century before we observed them.

Einstein wasn't just brilliant, he was deep: a scientist-philosopher who knew just how to describe the human condition.

That genius, combined with the Earth-shaking human highs and lows Einstein witnessed during his lifetime, made for a perspective on life that's yet to be matched.

We've compiled a list of Einstein's 15 best quotes, which teach us about the mind, learning, and that crazy thing called life.

On the passing of time

On the passing of time

On being happy

On being happy

On education

On education

On the mystery of physics

On the mystery of physics

On praise

On praise

On humans' understanding of time

On humans' understanding of time

On evil

On evil

On physical appearance

On physical appearance

On scientific progress

On scientific progress

On politics

On politics

On rule-following

On rule-following

On self-awareness

On self-awareness

On imagination

On imagination

On bias

On bias

On the unknown

On the unknown

This article was originally published by Business Insider.

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