What meanest thou by this word “forgiveness”?

Master: 

What meanest thou by this word “forgiveness”? 

Student: 

That the faithful do obtain at God’s hand discharge of their fault and pardon of their offense: for God, for Christ’s sake, freely forgiveth them their sins, and rescueth and delivereth them from judgment and damnation, and from punishments just and due for their ill - doing.

Master:

Cannot we then, with godly, dutiful doings, and works, satisfy God, and by ourselves merit pardon of our sins? 

Student:

There is no mercy due to our merits, but God doth yield and remit to Christ his correction and punishment that he would have done upon us. For Christ alone, with sufferance of his pains and with his death, wherewith he hath paid and performed the penalty of our sins, hath satisfied God. Therefore by Christ alone we have access to the grace of God. We, receiving this benefit of his free liberality and goodness, have nothing at all to offer or render again to him by way of reward or recompense.

Nowell’s Catechism 1572