Maschil--literally, "giving instruction." The Psalmist describes the blessings of His forgiveness, succeeding the pains of conviction, and deduces from his own experience instruction and exhortation to others. (Psa 32:1-11)
(Compare Rom 4:6).
forgiven--literally, "taken away," opposed to retain (Joh 20:23).
covered--so that God no longer regards the sin (Psa 85:3).