Everybody's got a different circle of competence. The important thing is not how big the circle is. The important thing is staying inside the circle.

What is important is not the quantity of your knowledge but its quality. You can know many things without knowing the most important.

The spirit of man is more important than mere physical strength, and the spiritual fiber of a nation than its wealth. The Bible is endorsed by the ages. Our civilization is built upon its words. In no other book is there such a collection of inspired wisdom, reality, and hope.

Where you are going to spend your time and your energy is one of the most important decisions you get to make in life.

When people tell me they've learned from experience, I tell them the trick is to learn from other people's experience.

Knowing the edge of your competency is important. If you think you know more than you do, you will get in trouble.