In God alone, essence (what He is) and existence (that he is) coincide.

Pain is a sensation produced by something contrary to the course of nature and this sensation is set up by one of two circumstances: either a very sudden change of the temperament (or the bad effect of a contrary temperament) or a solution of continuity.

As to the mental essence, we find it in infants devoid of every mental form.

Disease is an abnormal state of the body which primarily and independently produces a disturbance in the normal functions of the body. It may be an abnormality of temperament or form (structure). Symptom is a manifestation of some abnormal state in the body. It may be harmful as a colic pain or harmless as the flushing of cheeks in peripneumonia.

The more brilliant the lightning, the quicker it disappears.

In God alone, essence (what He is) and existence (that he is) coincide.

There are no incurable diseases — only the lack of will. There are no worthless herbs — only the lack of knowledge.