[T]he Father, the Son, and the Holy Ghost [are] three ... not in condition, but in degree; not in substance, but in form; not in power, but in aspect; yet of one substance, and of one condition, and of one power, inasmuch as He is one God, from whom these degrees and forms and aspects are reckoned, under the name of the Father, and of the Son, and of the Holy Ghost.
TertullianBut now inquiry is being made concerning these issues. First, can any believer enlist in the military? Second, can any soldier, even those of the rank and file or lesser grades who neither engage in pagan sacrifices nor capital punishment, be admitted into the church? No on both counts.
TertullianWe say, and we say openly, and while ye torture us, mangled and gory we cry out, "We worship God through Christ!" Believe Him a man: it is through Him and in Him that God willeth Himself to be known and worshipped.
TertullianThe Law found more than it lost when Christ said, โLove your enemies and pray for those who persecute you, so that you may be sons of your Father who is in heavenโ (Matthew 5:44-45). This most important commandment summarizes in a word the universal discipline of patience, since it does not allow us to do evil even to people who deserve it.
Tertullian