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

Maya Angelou

There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves.

Will Rogers

A proud man is always looking down on things and people; and, of course, as long as you are looking down, you cannot see something that is above you.

C. S. Lewis

La verdadera locura quizá no sea otra cosa que la sabiduría misma que, cansada de descubrir las vergüenzas del mundo, ha tomado la inteligente resolución de volverse loca.

Heinrich Heine

If you want your life to be more rewarding, you have to change the way you think.

Oprah Winfrey

Learning without wisdom is a load of books on a donkey's back.

Zora Neale Hurston