If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.
Someone's sitting in the shade today because someone planted a tree a long time ago.
Sometimes - history needs a push.
We don't see things as they are, we see them as we are.
In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things.
You can have it all. Just not all at once.
When one has not had a good father, one must create one.
A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.
Anyone who lives within their means suffers from a lack of imagination.
Wrinkles should merely indicate where the smiles have been.
The journey of a thousand miles begins with one step.
Some people are desperately looking for scapegoats, they just don't want to see the truth!
Science is the outcome of being prepared to live without certainty and therefore a mark of maturity. It embraces doubt and loose ends.
Life swings like a pendulum backward and forward between pain and boredom.
Consistency is contrary to nature, contrary to life. The only completely consistent people are the dead.
I'm not sure I'm adult yet.
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?
Anybody can dig a hole and plant a tree. But make sure it survives. You have to nurture it, you have to water it, you have to keep at it until it becomes rooted so it can take care or itself. There are so many enemies of trees.
He who has a why to live can bear with almost any how.
During the first period of a man's life the greatest danger is not to take the risk.
You have to go on and be crazy. Craziness is like heaven.