If necessity is the mother of invention, discontent is the father of progress.

You know, gentlemen, that I do not owe any personal income tax. But nevertheless, I send a small check, now and then, to the Internal Revenue Service out of the kindness of my heart.

My grandfather, along with Carnegie, was a pioneer in philanthropy, which my father then practiced on a very large scale.

I can only say that I have had a wonderful life.

Whatever the price of the Chinese Revolution, it has obviously succeeded not only in producing more efficient and dedicated administration, but also in fostering high morale and community of purpose. The social experiment in China under Chairman Mao's leadership is one of the most important and successful in human history.

I think of art as the highest level of creativity. To me, it is one of the greatest sources of enjoyment.

We are on the verge of a global transformation. All we need is the right major crisis.