To do great things is difficult, but to command great things is more difficult.

Excellence is rarely found, more rarely valued.

The best we can do is size up the chances, calculate the risks involved, estimate our ability to deal with them, and then make our plans with confidence.

The best is the enemy of the good.

Excellence encourages one about life generally; it shows the spiritual wealth of the world.

There's a way to do better... find it.

I have offended God and mankind because my work didn't reach the quality it should have.

It has always been my belief that a man should do his best, regardless of how much he receives for his services, or the number of people he may be serving or the class of people served.

It's enough for you to do it once for a few men to remember you. But if you do it year after year, then many people remember you and they tell it to their children, and their children and grandchildren remember and, if it concerns books, they can read them. And if it's good enough, it will last as long as there are human beings.

Let each day be your masterpiece.