There is something in us that keeps us where we find ourselves. I think this is the most awful thing of all.

I have become so accustomed to think "scientifically" that I am afraid even to imagine that there may be something else beyond the outer covering of life. I feel like a man condemned to death, whose companions have been hanged and who has already become reconciled to the thought that the same fate awaits him.

Man is a machine which reacts blindly to external forces and, this being so, he has no will, and very little control of himself, if any at all. What we have to study, therefore, is not psychology-for that applies only to a developed man-but mechanics. Man is not only a machine but a machine which works very much below the standard it would be capable of maintaining if it were working properly.

Our ancestors were very rich and eminent people, and they left us an enormous inheritance, which we have completely forgotten, especially since the time when we began to consider ourselves the descendants of a monkey.

The problem of Eternity, of which the face of the Sphinx speaks, takes us into the realm of the impossible. Even the problem of Time is simple in comparison with the problem of Eternity.

One cannot keep all old views and opinions and acquire new ones.

Begin with the possible: begin with one step. There is always a limit you cannot do more than you can do. If you try to do too much you will do nothing