What's your favorite Warren Buffett Quote/Lesson?

[Michael Rogers]

For the Warren Buffett fans out there, I've got a question.  What is your favorite Warren Buffett quote/or lesson?  

Mine is his perspective on how lucky we are to have been born in America at this particular time in history.  When he breaks down the math on what your chances are to have been born in America vs other countries it really makes me feel fortunate to have been born here vs certain other countries that don't have the social stability, laws, human rights, etc that I sometimes take for granted.  

Here is a quick clip of him explaining his perspective.

https://youtu.be/Z4glkcb7HHE

[Ned Carey]

“Be Fearful When Others Are Greedy and Greedy When Others Are Fearful”