2 Corinthians 3:5-6

Not that we are sufficiently qualified in ourselves to claim anything as coming from us, but our sufficiency and qualifications come from God. He has qualified us [making us sufficient] as ministers of a new covenant [of salvation through Christ], not of the letter [of a written code] but of the Spirit; for the letter [of the Law] kills [by revealing sin and demanding obedience], but the Spirit gives life. [Jer 31:31]