It's not that I'm so smart, it's just that I stay with problems longer

The worst solitude is to have no real friendships.

Be the change you want to see in the world.

Either write something worth reading or do something worth writing

He who opens a school door, closes a prison.

Never put off till tomorrow what you can do today.

Life can only be understood backwards, but it must be lived forward

Rare as is true love, true friendship is rarer

It is the province of knowledge to speak, and it is the privilege of wisdom to listen.

In three words I can sum up everything I've learned about life. It goes on.