Many things are mechanical and should remain mechanical. But mechanical thoughts, mechanical feelings—that is what has to be studied and can and should be changed. Mechanical thinking is not worth a penny. You can think about many things mechanically, but you will get nothing from it.

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.

Most people can accept the truth only in the form of a lie.

The strangest and most fantastic fact about negative emotions is that people actually worship them.

Philosophy is based on speculation, on logic, on thought, on the synthesis of what we know and on the analysis of what we do not know. Philosophy must include within its confines the whole content of science, religion and art.

When a man begins to know himself a little he will see in himself many things that are bound to horrify him. So long as a man is not horrified at himself he knows nothing about himself.

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.