3. A third reason is, For that God will in the forgiveness of sin, magnify the riches of his mercy; but this cannot be, if God shall suffer, or accept of such confession of sin, as is yet intermixed with those things that will darken the heinousness of the offence, and that will be darkened either by a partial, feigned, or overly confession: or by a joining with the confession any of the sinners pretended good deeds.
That God in the salvation, and so in the confession of the sinner, designs the magnifying of his mercy, is apparent enough from the whole current of scripture, and that any of the things now mentioned will, if suffered to be done, darken and eclipse this thing, is evident to reason itself.
Suppose a man stand indicted for treason, yet shall so order the matter, that it shall ring in the country, that his offences are but petty crimes; though the king shall forgive this man, much glory shall not thereby redound to the riches and greatness of his mercy. But let all things lie naked, let nothing lie hid or covered, let sin be seen, shewn, and confessed, as it is with and in the sinner himself, and then there will be in his forgiveness a magnifying of mercy.
4. A fourth reason is, for that else God cannot be justified in his sayings, nor overcome when he is judged. (Psa 51, Rom 3) God's word hath told us what sin is, both as to its nature and evil effects. God's word hath told us, that the best of our righteousnesses are not better than filthy rags. God's word has also told us, that sin is forgiven us freely by grace, and to for the sake of our amendments: and all this God will have shewn, not only in the acts of his mercy towards, but even in the humiliations and confessions of the penitent: For God will have his mercy begin to be displayed even there where the sinner hath taken his first step toward him: "That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord." (Rom 5:21)
5. A fifth reason is, because God would have by the Publican's conversion, others affected with the displays and discoveries of wonderful grace; but to cloud and cover it with lessening of sin, and the sinful righteousness of man, is not the way to do this. Wherefore the sinner's confession must be such as is full, nor must anything of his to lessen sin come in betwixt confession and mercy; and this is the way to affect others [who are] as bad as Publicans and sinners, and to make them come in to God for mercy.
For what will such say when sin begins to appear to the conscience, and when the law shall follow it with a voice of words, each one like a clap of thunder? I say, what will such say when they shall read that the Publican did only acknowledge his iniquity, and found grace and favour at the hand of God? But that God is infinitely merciful; merciful indeed, and that to those, or to such, as do in truth stand in need of mercy. Also that he sheweth mercy of his own good pleasure, nothing moving him thereto but the bounty of his own goodness and the misery of his creature.
I say, this is the way to make others be affected with mercy; as he saith, by the apostle Paul, "But God, who is rich in mercy, for his great love wherewith he loved us, even when we were dead in sins, hath quickened us together with Christ, [by grace ye are saved] and hath raised us up together, and made us sit together in heavenly places in Christ Jesus: That in the ages to come he might shew the exceeding riches of his grace in his kindness toward us through Christ Jesus." (Eph 2:4-7) You may also see that: 1 Timothy 1:15, 16. 6. Another reason of this is, because this is the way to heighten the comfort and consolation of the soul; and that both here and hereafter. What tendeth more to this, than for sinners to see, and with guilt and amazement to confess what sin is, and so to have pardon extended from God to the sinner as such? This fills the heart; this ravishes the soul! this puts a whole heaven of joy into every one of the thoughts of salvation from sin, and deliverance from wrath to come. "And the ransomed of the Lord shall return, and come to Zion with songs and everlasting joy upon their heads: they shall obtain joy and gladness, and sorrow and sighing shall flee away." (Isa 35:10) Indeed the belief of this makes joy and gladness endless: I say, it will make it begin here, and make that it shall never have consummation in heaven.
7. Besides, it layeth upon the soul the greatest obligations to holiness; what like the apprehension of free forgiveness, and that apprehension must come in through a sight of the greatness of sin, and of my inability to do anything towards satisfaction, to engage the heart of a rebel and traitor to love his prince, and to submit to his laws.
When Elisha had taken the Syrians captives, some were for using severities towards them; but he said, "Set bread and water before them, that they may eat and drink, and go to their master"; and they did so. And what follows, "So the bands of Syria came no more into the land of Israel." He conquered their malice with his compassion. And it is the love of Christ that constraineth to live to him. (2 Kings 6:22,23, 2 Cor 5:14)
Many other things might possibly be urged, but at present let these be sufficient.