You never know what motivates you.
By failing to prepare, you are preparing to fail.
If you think you can do it, you can.
Know or listen to those who know.
Always desire to learn something useful.
If you can dream it, you can do it.
The wise does at once what the fool does at last.
Never complain and never explain.
Quality is not an act, it is a habit.
Well done is better than well said.
The best way to have a good idea is to have a lot of ideas.
Satisfaction of one's curiosity is one of the greatest sources of happiness in life.
Facts are the air of scientists. Without them you can never fly.