Every judgement of conscience, be it right or wrong, be it about things evil in themselves or morally indifferent, is obligatory, in such wise that he who acts against his conscience always sins.

Law; an ordinance of reason for the common good, made by him who has care of the community.

It is necessary for the perfection of human society that there should be men who devote their lives to contemplation.

Love follows knowledge.

The soul is like an uninhabited world that comes to life only when God lays His head against us.

Given the sin of impiety through which they [the Romans] sinned against the divine nature [by idolatry], the punishment that led them to sin against their own nature followed.... I say, therefore, that since they changed into lies [by idolatry] the truth about God, He brought them to ignominious passions, that is, to sins against nature; not that God led them to evil, but only that he abandoned them to evil.

Nothing which implies contradiction falls under the omnipotence of God.