This is why the Socratic Associates have been called pantheists, because according to them this soul cannot be separated from the Universe itself. Matter is made up of atoms. The basic bodies, or the elements of the elements, are very simple, indivisible, incorruptible, and infinite in species and number. Motion is inherent to matter. There is not in nature a sole point at rest, but only occasionally in relation to other bodies, since even rest is only a resistance to motion.
Thought is a special movement of the brain.
The brain is the first cause of the soul, of thoughts and of sensations. Brain, being a highly composite material organ, can produce only material effects. Thus all ideas are corporal. This fire is the only thing that can traverse nerves. Death is merely a transformation of matter Nothing dies totally, the death of one thing brings the birth of another, by a universally reciprocal exchange, and everything contributes necessarily to the preservation and welfare of the Whole by a continual change of forms and a marvelous variation which forms an eternal cycle.