Humanity's true perfection is intellectual, holding true ideas about God, and it alone is one's own and gives immortality

The fourth kind of perfection is the true perfection of man; the possession of the highest intellectual faculties; the possession of such notions which lead to true metaphysical opinions as regards God. With this perfection man has obtained his final object; it gives him true human perfection; it remains to him alone; it gives him immortality, and on its account he is called man.