Obstacles are those frightful things you see when you take your eyes off your goal.

Two classes of people lose money; those who are too weak to guard what they have; those who win money by trick. They both lose in the end.

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it.

He who would really benefit mankind must reach them through their work.

The public should always be wondering how it is possible to give so much for the money.

The air is full of ideas. They are knocking you in the head all the time. You only have to know what you want, then forget it, and go about your business. Suddenly, the idea will come through. It was there all the time.

You must know all there is to know in your particular field and keep on the alert for new knowledge. The least difference in knowledge between you and another man may spell his success and your failure.