Don't let making a living prevent you from making a life.
I think the highest and lowest points are the important ones. Anything else is just...in between.
Not all things are to be discovered; many are better concealed.
It is easier to influence strong than weak characters in life.
As you go through life, you've got to see the valleys as well as the peaks.
Life is tough, but it's tougher when you're stupid.
If you want a happy ending, that depends, of course, on where you stop your story.
It is not how old you are, but how you are old.
We all owe death a life.
Freedom would be not to choose between black and white but to abjure such prescribed choices.
If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.
What goes up must come down.
I'd trade all my tomorrows for a single yesterday.
We can never judge the lives of others, because each person knows only their own pain and renunciation. It's one thing to feel that you are on the right path, but it's another to think that yours is the only path.
Everything existing in the universe is the fruit of chance and necessity.
I'm not sure I'm adult yet.
It is not the length of life, but the depth.
Each man should frame life so that at some future hour fact and his dreaming meet.
All good things which exist are the fruits of originality.
The historian looks backward. In the end he also believes backward.
Mastery of the emotions is fundamental to a virtuous life.