Everything excellent is as difficult as it is rare.
Each problem that I solved became a rule which served afterwards to solve other problems.
It has seemed to be more necessary to have regard to the weight of words rather than to their number.
If you are a parent, open doors to unknown directions to the child so he can explore. Don't make him afraid of the unknown,give him support.
Moderation in temper is always a virtue; but moderation in principle is always a vice.
Nobody has the power to take two steps together; you can take only one step at a time.
When you judge another, you do not define them, you define yourself.
When you dance, your purpose is not to get to a certain place on the floor. It's to enjoy each step along the way.
Good advice is always certain to be ignored, but that's no reason not to give it.
Intelligence is the ability to adapt to change.
No matter how much suffering you went through, you never wanted to let go of those memories.
Doubt is the origin of wisdom
Jealousy is the tribute mediocrity pays to genius.
What can't be cured must be endured.
As the soft yield of water cleaves obstinate stone, So to yield with life solves the insolvable: To yield, I have learned, is to come back again.
Men become wise just as they become rich, more by what they save than by what they receive.
The only way to get the best of an argument is to avoid it.
Don't criticize what you don't understand, son. You never walked in that man's shoes.
An understanding of the natural world is a source of not only great curiosity, but great fulfilment.
By three methods we may learn wisdom: first, by reflection which is noblest; second, by imitation, which is the easiest; and third, by experience, which is the bitterest.
It is the mark of an educated mind to be able to entertain a thought without accepting it.