Some are born great, some achieve greatness, and some have greatness thrust upon them.
- William Shakespeare
People who think they know everything are a great annoyance to those of us who do.
- Isaac Asimov
The greatest leader is not necessarily the one who does the greatest things. He is the one that gets the people to do the greatest things.
- Ronald Reagan
A great man shows his greatness by the way he treats little men.
- Thomas Carlyle