The principal chapters of the contents found in this sixth book of Mercury, which is the first book of the Asclepius.

On the immortality of the human soul, treated distinctly and abundantly.
On the creation of the soul and the wondrous nature of man.
On the soul, showing that it is not produced from seed.
On the soul, showing that it is not by traduction original: "ex traduce"; the theological theory that a child's soul is generated from the parents' souls, rather than being a new creation by God..
On the seminal reason.
On the soul, showing that it is not a part of God.
On the unity of the soul.
On the threefold soul.
On the World Soul original: "anima mundi"; the concept that the entire universe possesses a living, spiritual soul that connects all things..
On the soul: whether it is composite.
On the levels of the soul.
On the soul, showing that it is not a body, nor is it corporeal.
On the soul, showing that it is a substance.
On substance.
Whether one soul is more perfect than another.
On the soul, showing that it is act original: "actus"; in Aristotelian philosophy, "actuality" or the realization of a thing's potential..
On the soul, showing that it is the principle of understanding, sensing, moving from place to place, and growing.
On the soul, showing that it is form original: "forma"; the essential principle that gives a thing its specific identity and nature..
On the soul, showing that it is number.
On the soul: whether it is made from the elements.
On the category original: "prædicamento"; one of the ten categories of being defined by Aristotle, such as substance or quality. of substance.
On the category of quantity.
On the category of relation.
On the category of quality.
On equivocal and univocal terms.
On the divisions of being.
On the soul, showing that it is the image of God.
In praise of the soul.
On the powers of the soul.
On the apex and center of the soul.
On the human intellect according to various authors.

On the higher and lower reason.
On the passive intellect.
On the intellect, showing that it is the substance of the soul and a being in act.
On the material intellect.
On the intellect in act and in habit.
On the acquired intellect original: "intellectu adepto"; the stage of understanding reached when the human mind is fully enlightened by divine or universal truths..
On the speculative and practical intellect.
On the intellect: how it understands separate substances.
On the reason of man.
On the act of understanding, or our intelligence.
On the intellect: how it understands God, angels, and itself.
On the forms imprinted upon the human intellect.
On the intelligible species original: "specie intelligibili"; the mental image or representation through which the mind recognizes the essence of an object..
On the act of understanding, showing that it is an action, and how it occurs.
On the intellect, showing how it composes, divides, and understands the indivisible.
On the active intellect, showing that it is a part of the soul.
The active and the possible intellect are not two, but one intellect.
On the intellect as an object.
On the intellect, showing how it understands individual things.
On the human intellect, showing that it does not know future things.
On the soul when separated from the body, and how it knows.
On remembrance after death.
That the dead do not know the affairs of the living.