Better mad with the rest of the world than wise alone.
Nobody has the power to take two steps together; you can take only one step at a time.
Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.
If we do not lay out ourselves in the service of mankind whom should we serve?
We learn from our gardens to deal with the most urgent question of the time: How much is enough?
Experience teaches us that it is much easier to prevent an enemy from posting themselves than it is to dislodge them after they have got possession.
Each problem that I solved became a rule which served afterwards to solve other problems.
Real knowledge is to know the extent of one's ignorance.
To be one, to be united is a great thing. But to respect the right to be different is maybe even greater.
All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.
Don't compromise yourself. You are all you've got.
Act enthusiastic and you will be enthusiastic
If you buy what you do not need, you will need what you cannot buy.
Experience keeps a dear school, but fools will learn in no other.
Throw your heart over the fence and the rest will follow.
It is tact that is golden, not silence.
Thoughts without content are empty, intuitions without concepts are blind.
The greatest minds are capable of the greatest vices as well as of the greatest virtues.
Don't raise your voice, improve your argument.
It takes a lot of courage to show your dreams to someone else.
Think globally, act locally.