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
Augustine of Hippo
AD 430
For, if you take away the Spirit, how does the law avail? It makes a prevaricator. On that account the Scripture says: “The letter kills.” The law orders and you do not obey… . Something is commanded, and you do not do it; something is forbidden, and you do it. Behold, “the letter kills.”