"The study of truth requires a considerable effort—which is why few are willing to undertake it out of love of knowledge—despite the fact that God has implanted a natural appetite for such knowledge in…"

"It is lawful to take a man's property if he is an infidel and is warring against the Church."

"Good can exist without evil, whereas evil cannot exist without good."

"The proper object of the human intellect is the quiddity or essence of a material thing."

"Man is by nature a social animal."