Be thine own palace, or the world's thy jail.
Be kind whenever possible. It is always possible.
You never know what motivates you.
Never complain and never explain.
If you've got a talent, protect it.
If you're going through hell, keep going.
To be a good loser is to learn how to win.
By failing to prepare, you are preparing to fail.
Problems are not stop signs, they are guidelines.
I can, therefore I am.
The diversity of the phenomena of nature is so great, and the treasures hidden in the heavens so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.