All great achievements require time.
A mistake is always forgivable, rarely excusable and always unacceptable.
If we know exactly where we're going, exactly how to get there, and exactly what we'll see along the way, we won't learn anything.
Beauty is not in the face; beauty is a light in the heart.
Every aquarium will eventually leak.
Resist much. Obey little.
Adapt what is useful, reject what is useless, and add what is specifically your own.
What a man does for others, not what they do for him, gives him immortality.
Half the world is composed of people who have something to say and can't, and the other half who have nothing to say and keep on saying it.
Creativity is the greatest rebellion in existence.
Doubt is the origin of wisdom
What's done can't be undone.
In the midst of movement and chaos, keep stillness inside of you.
It is not enough to have a good mind; the main thing is to use it well.
Reflect upon your present blessings, of which every man has many; not on your past misfortunes, of which all men have some.
Science is organized knowledge. Wisdom is organized life.
Tact is the knack of making a point without making an enemy.
Each problem that I solved became a rule which served afterwards to solve other problems.
Experience keeps a dear school, but fools will learn in no other.
Colorless green ideas sleep furiously
Confidence is contagious. So is lack of confidence.