There is nothing either good or bad, but thinking makes it so.

——William Shakespeare, "Hamlet"

There is nothing inherently good or bad in the world. The difference is determined by thinking. ——William Shakespeare, "As You Like It"

The fool doth think he is wise, but the wise man knows himself to be a fool.

A fool thinks he is smart, but a wise man knows himself. ——William Shakespeare, "Julius Caesar"

Cowards die many times before they die; warriors die only once. ——Shakespeare's "Julius Caesar"

These are some of my favorites.