Every soul, then, by reason of its birth, has its nature in Adam until it is born again in Christ; moreover, it is unclean all the while that it remains without this regeneration; and because unclean, it is actively sinful, and suffuses even the flesh (by reason of their conjunction) with its own shame.
TertullianGod the Father's a deep root; the Son's the shoot that breaks into the world; the Spirit spreads the beauty & fragrance
TertullianHe has inhibited discussion by designating admonition as the method of dealing with a heretic- and the first method, too, because he is not a Christian. This is so that he would not seem to require correction again and again and before two or three witnesses as though he were a Christian. He ought to be corrected for the very reason that he is not to be disputed with. In addition, this is said because a controversy over the Scriptures can, clearly, produce no other effect than help to upset either the stomach or the brain.
TertullianThe 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.
TertullianThe Lord's Prayer "is truly the summary of the whole gospel." "Since the Lord...after handling over the practice of prayer, said elsewhere, 'Ask and you will receive,' and since everyone has petitions which are peculiar to his circumstances, the regular and appropriate prayer (the Lord's Prayer) is said first, as the foundation of further desires.
Tertullian