Some say opportunity knocks only once, That is not true. Opportunity knocks all the time, but you have to be ready for it. If the chance comes, you must have the equipment to take advantage of it.

There will come a time when you believe everything is finished. Yet that will be the beginning.

Knowledge is awareness, and to it are many paths, not all of them paved with logic. But sometimes one is guided through the maze by intuition. One is led by something felt on the wind, something seen in the stars, something that calls from the wastelands to the spirit.

I'm actually writing history. It isn't what you'd call big history. I don't write about presidents and generals... I write about the man who was ranching, the man who was mining, the man who was opening up the country.

Anger is a killing thing: it kills the man who angers, for each rage leaves him less than he had been before - it takes something from him.

For one who reads, there is no limit to the number of lives that may be lived, for fiction, biography, and history offer an inexhaustible number of lives in many parts of the world, in all periods of time.