2 Corinthians 3:6

Hath made us able ministers; hath given us sufficiency to be ministers, as the original means.

The new testament; the new covenant of the gospel, revealing the way of salvation through Jesus Christ.

Not of the letter; not of the outward form merely, but of the design, end, and spiritual meaning, the right apprehension and cordial reception of which is, through the grace of God, life-giving, while dependence upon the letter or outward form merely is ruinous to the soul. To rely for salvation on the possession of the Scriptures, on the stated reading of them, or on any outward forms and privileges, is destructive; while the right understanding of the Scriptures, and spiritual obedience to their true meaning, are saving to the soul.