So far, I have been a spectator in this theater which is the world, but I am now about to mount the stage, and I come forward masked.

Now therefore, that my mind is free from all cares, and that I have obtained for myself assured leisure in peaceful solitude, I shall apply myself seriously and freely to the general destruction of all my former opinions.

For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it.

There is a little gland in the brain in which the soul exercises its functions in a more particular way than in the other parts.

Human wisdom remains always one and the same although applied to the most diverse objects and it is no more changed by their diversity than the sunshine is changed by the variety of objects which it illuminates.

How do we know that anything really exists, that anything is really the way it seems ot us through our senses?

I desire to live in peace and to continue the life I have begun under the motto 'to live well you must live unseen