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

The more brilliant the lightning, the quicker it disappears.

The world is divided into men who have wit and no religion and men who have religion and no wit.

God, the supreme being, is neither circumscribed by space, nor touched by time; he cannot be found in a particular direction, and his essence cannot change. The secret conversation is thus entirely spiritual; it is a direct encounter between God and the soul, abstracted from all material constraints.

That whose existence is necessary must necessarily be one essence.

Leeches should be kept a day before applying them. They should be squeezed to make them eject the contents of their stomachs.

The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes.