Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
Colorless green ideas sleep furiously
Good means not merely not to do wrong, but rather not to desire to do wrong.
All great achievements require time.
The heart has its reasons which reason knows not.
Your visions will become clear only when you can look into your own heart. Who looks outside, dreams; who looks inside, awakes.
When you learn, teach, when you get, give.
Fear doesn't exist anywhere except in the mind.
I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.
In anger we should refrain both from speech and action.
Experience is the only prophecy of wise men.
There are two educations. One should teach us how to make a living and the other how to live.
I think, therefore I am.
We learn from our gardens to deal with the most urgent question of the time: How much is enough?
If you do what you've always done, you'll get what you've always gotten.
It seems essential, in relationships and all tasks, that we concentrate only on what is most significant and important.
If you don't want to slip up tomorrow, speak the truth today.
Simplicity is the ultimate sophistication.
Honesty is the first chapter in the book of wisdom.
An understanding of the natural world is a source of not only great curiosity, but great fulfilment.
Tomorrow hopes we have learned something from yesterday.