In pain shall you bring forth children, woman, and you shall turn to your husband and he shall rule over you. And do you not know that you are Eve? God's sentence hangs still over all your sex and His punishment weighs down upon you. You are the devil's gateway; you are she who first violated the forbidden tree and broke the law of God. It was you who coaxed your way around him whom the devil had not the force to attack. With what ease you shattered that image of God: Man! Because of the death you merited, even the Son of God had to die... Woman, you are the gate to hell.
TertullianThere are still preserved among Christians traces of that Holy Spirit that appeared in the form of a dove. They expel evil spirits, perform many cures, and foresee certain events.
TertullianThus 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.
TertullianIn our case, murder being once for all forbidden, we may not destroy even the foetus in the womb, while as yet the human being derives blood from other parts of the body for its sustenance. To hinder a birth is merely a speedier mankilling; nor does it matter whether you take away a life that is born, or destroy one that is coming to the birth. That is a man which is going to be one; you have the fruit already in the seed.
TertullianThe angels as the guardians of men are set over men as instructors and monitors. This shows the relationship that is to exist between them. Man's attitude is to be one of obedience and subjection. He is to follow the lead of the angels, and consequently some reverence is already implied in the very relationship that exists between man and angel.
Tertullian