The old covenant had to be taught (see Deuteronomy 6:4–9), but the new covenant focuses on a personal relationship with the Lord.
I will forgive: Each believer who repents will experience God's forgiveness.
I...will remember their sins no more: Once sins are forgiven, they will not lead to divine judgment (see Hebrews 10:17).
Jesus’ death started the new covenant (see Matthew 26:28; Mark 14:24; Luke 22:20; 1 Corinthians 11:25; 2 Corinthians 3:6; Hebrews 8; 9:15; 12:22–24).