QUOTE : Although I have known sorrow and great sadness, as is everybody's lot, I don't think that I have had an unhappy hour as a philosopher since we returned to England. I have worked hard, and I have often got deep into insoluble difficulties. But I have been most happy in finding new problems, in wrestling with them, and in making some progress. This, or so I feel, is the best life. It seems to me infinitely better than the life of mere contemplation (to say nothing of divine self-contemplation) which Aristotle recommends as the best. It is a completely restless life, but it is highly self-contained/autark in Plato's sense, although no life, of course, can be fully autark.