One of the secrets of life is to keep our intellectual curiosity acute.

A well-ordered life is like climbing a tower; the view halfway up is better than the view from the base, and it steadily becomes finer as the horizon expands.

You can learn more about human nature by reading the Bible than by living in New York.

I find daily life not always joyous, but always interesting. I have some sad days and nights, but none that are dull. As I advance deeper into the vale of years, I live with constantly increasing gusto and excitement. I am sure it all means something; in the last analysis, I am an optimist because I believe in God. Those who have no faith are quite naturally pessimists and I do not blame them.

I do not know how wicked American millionaires are, but as I travel about and see the results of their generosity in the form of hospitals, churches, public libraries, universities, parks, recreation grounds, art museums and theatres I wonder what on earth we should do without them.

Real happiness is not dependent on external things.

In a start-up company, you basically throw out all assumptions every three weeks.