To bear with patience wrongs done to oneself is a mark of perfection, but to bear with patience wrongs done to someone else is a mark of imperfection and even of actual sin.

Likewise grace and glory are referred to the same genus, since grace is nothing other than a certain first beginning of glory in us.

Practical sciences proceed by building up; theoretical science by resolving into components.

A person is disposed to an act of choice by an angel ... in two ways. Sometimes, a man's understanding is enlightened by an angel to know what is good, but it is not instructed as to the reason why ... But sometimes he is instructed by angelic illumination, both that this act is good and as to the reason why it is good.

Rarely affirm, seldom deny, always distinguish.

Prostitution in the towns is like the cesspool in the palace; take away the cesspool and the palace will become an unclean and evil smelling-place.

A scrap of knowledge about sublime things is worth more than any amount about trivialities.