[Hermogenes] despises God's law in his painting, maintains repeated marriages [almost certainly a reference to remarrying after divorce or perhaps even widowhood, which Tertullian, who became a Montanist, opposed], alleges the law of God in defense of lust [likely same reference], and yet despises it in respect of his art.

Truth persuades by teaching, but does not teach by persuading.

Thus the connection of the Father in the Son, and of the Son in the Paraclete, produces three coherent Persons, who are yet distinct One from Another. These three are one [thing], not one [Person], as it is said, 'I and my Father are One,' in respect of unity of substance not singularity of number.

The Son of God died; it is by all means to be believed because it is absurd. And he was buried and rose again; the fact is certain, because it is impossible.

You can judge the quality of their faith from the way they behave. Discipline is an index to doctrine.

Let the emperor make war on heaven; let him lead heaven captive in his triumph; let him put guards on heaven; let him impose taxes on heaven! He cannot. . . . He gets his sceptre where he first got his humanity; his power where he got the breath of life.

For it is really better for us not to know a thing, because [God] has not revealed it to us, than to know it according to man’s wisdom, because he has been bold enough to assume it.