You may find the worst enemy or best friend in yourself.

English Proverb

We are at our most powerful the moment we no longer need to be powerful.

Eric Micha'el Leventhal

It is better to offer no excuse than a bad one.

George Washington

I have learned to use the word impossible with the greatest caution.

Werner von Braun

I believe that imagination is stronger than knowledge - myth is more potent than history - dreams are more powerful than facts - hope always triumphs over experience - laughter is the cure for grief - love is stronger than death.

Robert Fulghum

Worthless people blame their karma.

Burmese Proverb