In a word, being to bring Christ and the church together, our aim must be, to persuade people to come out of their estate they are in, to come and take Christ. Whatsoever makes for this, that course we must use, though it be with never so much abasing of ourselves. Therefore the gospel is promulgated in a sweet manner. 'I beseech you, brethren, by the mercies of God,' &c. The law comes with 'Cursed, cursed;' but now in the gospel Christ is preached with sweet alluring. 'I beseech you, brethren,' and 'We as ambassadors beseech you, as if Christ by us did beseech you,' &c., 2 Cor. v. 20. This is the manner of the dispensation in the gospel, even to beg of people that they would be good to their own souls. Christ, as it were, became a beggar himself, and the great God of heaven and earth begs our love, that we would so care for our own souls that we would be reconciled unto him. It was fitter, indeed, that we should beg of him. It was fit we should seek to be reconciled to him, but God so stoops in the dispensation and ministry of the gospel, that he becomes a beggar and suitor to us to be good to our souls. As if he had offended us, he desires us to be reconciled. The wrong is done on our part, yet he so far transcends the doubtings of man's nature, that he would have nothing to cause man's heart to misgive, no doubts or scruples to arise. He himself becomes a beseecher of reconciliation, as if he were the party that had offended. This is the manner of the publication of the gospel.Richard Sibbes, "The Fountain Opened," in The Complete Works of Richard Sibbes (Edinburgh: James Nichol, 1863), 5:506–507.
This quote is also cited in ADDING TO THE CHURCH—THE PURITAN APPROACH TO PERSUADING SOULS by Erroll Hulse
This aspect is the actual manner in which they [the Puritans] addressed the Gospel to unbelievers in their preaching. How did they offer the Gospel to the unconverted? I avoid the word 'present' the Gospel. They did not merely 'present' the Gospel, they entreated, they besought, they reasoned, they urged and they offered the Gospel. Some are disposed to contend that the word 'offer' is unsuitable as it implies creature ability or gives the impression that God is less than omnipotent to change hearts. Others say the word does not mean now what it meant in Puritan days. But Richard Sibbes uses a word indicating a condescension stooping lower than any such meaning implied by the word 'offer' which word I would contend has not changed. On II Cor. 5:20 Sibbes declares, 'This is the manner of the dispensation in the gospel, even to beg of people that they would be good to their souls. Christ, as it were, became a beggar himself, and the great God of heaven and earth begs our love, that we would so care for our souls that we would be reconciled unto him' (italics mine).Bio:
Credit to Barry Wallace