It’s not the critic that counts, not the man who points out how the strong man stumbles, or where the doer of deeds could have done better. The credit belongs to the man who is actually in the arena.
Theodore Roosevelt

Whatever you are be a good one.
Abraham Lincoln

It is every man's obligation to put back into the world at least the equivalent of what he takes out of it.
Albert Einstein

Always do right. This will gratify some people and astonish the rest.
Mark Twain