There is joy in work. There is no happiness except in the realization that we have accomplished something.

Those who never make mistakes work for those of us who do.

Whether you believe you can or not, you're right.

The short successes that can be gained in a brief time and without difficulty, are not worth much.

The truth frequently seems unreasonable; the truth frequently is depressing; the truth sometimes seems to be evil, but it has the eternal advantage, it is the truth and what is built thereon neither brings nor yields to confusion.

The longer an article is in the process of manufacture and the more it is moved about, the greater its ultimate cost.

If you need a machine and don't buy it, then you will ultimately find that you have paid for it and don't have it.