If you're going through hell, keep going.
Never complain and never explain.
Be kind whenever possible. It is always possible.
If you think you can do it, you can.
Only the educated are free.
Know or listen to those who know.
You never know what motivates you.
Be gentle to all and stern with yourself.
Expect problems and eat them for breakfast.
Problems are not stop signs, they are guidelines.
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.