Who also has made us able ministers of the new covenant; not of the letter, but of the spirit: for the letter kills, but the spirit gives life.
All Commentaries on 2 Corinthians 3:6 Go To 2 Corinthians 3
Tertullian of Carthage
AD 220
Therefore the New Testament will appertain to none other than Him who promised it-if not "its letter, yet its spirit; ".
Even if "the letter killeth, yet the Spirit giveth life; ".
Yet (he means) according to "the law of the letter"