What they understood did. What the fool does in the end, the wise man does in the beginning. When a person is always right, there is something wrong. When the going seems easy, you may be going downhill. When you don't have an education, you've got to use your brains.
Wisdom consists of letting the non-essentials pass by.
Worry takes as much time as work and pays less. You can lead a car to a highway, but you can't make it think. You can't steal second base and keep one foot on first. You never have to worry about contradictions when you stick to the facts. You're entitled to your own opinion, even if it is wrong.