To a wise and good man the whole earth is his fatherland.

What you're thinking is what you're becoming.

Science may set limits to knowledge, but should not set limits to imagination.

He who chooses the beginning of the road chooses the place it leads to.

Never do anything when you are in a temper, for you will do everything wrong.

It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.

Just remember, once you're over the hill you begin to pick up speed.

Bitterness is like cancer. It eats upon the host. But anger is like fire. It burns it all clean.

When you judge another, you do not define them, you define yourself.

What a liberation to realize that the “voice in my head” is not who I am. Who am I then? The one who sees that.

When you undervalue what you do, the world will undervalue who you are

Proverbs are short sentences drawn from long experience.

Muddy water is best cleared by leaving it alone.

Each problem that I solved became a rule which served afterwards to solve other problems.

In the practice of tolerance, one's enemy is the best teacher.

Tell the truth. Sing with passion. Work with laughter. Love with heart. 'Cause that's all that matters in the end.

Adapt what is useful, reject what is useless, and add what is specifically your own.

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.

Experience is merely the name men gave to their mistakes.

Reflect upon your present blessings, of which every man has many; not on your past misfortunes, of which all men have some.

A perfection of means, and confusion of aims, seems to be our main problem.