Isa 59:21

59:21 covenant. The Lord’s covenant of grace is renewed (42:6 note).

Spirit. The role of the Spirit of God is mentioned several times in the Old Testament (32:15; 44:3; Jer. 31:31–34; Ezek. 37:14; Zech. 12:10). The Spirit works “by and with the Word in our hearts” (Westminster Confession 1.5). His continuing presence with His people was secured with the revelation of the New Testament (John 16:7, 13; 2 Cor. 5:5; Gal. 3:14; 4:6).