Charles H. Spurgeon on Psalms 103:8

The Lord is merciful and gracious. Those with whom he deals are sinners. However much he favours them they are guilty and need mercy at his hands, nor is he slow to compassionate their lost estate, or reluctant by his grace to lift them out of it. Mercy pardons sin, grace bestows favour: in both the Lord abounds. This is that way of his which he made known to Moses (Ex 34:6), and in that way he will abide as long as the age of grace shall last, and men are yet in this life. He who "executeth righteousness and judgment, " yet delighteth in mercy. Slow to anger. He can be angry, and can deal out righteous indignation upon the guilty, but it is his strange work; he lingers long, with loving pauses, tarrying by the way to give space for repentance and opportunity for accepting his mercy. Thus deals he with the greatest sinners, and with his own children much more so: towards them his anger is shortlived and never reaches into eternity, and when it is shown in fatherly chastisements he does not afflict willingly, and soon pities their sorrows. From this we should learn to be ourselves slow to anger; if the Lord is longsuffering under our great provocations how much more ought we to endure the errors of our brethren! And plenteous in mercy. Rich in it, quick in it, overflowing with it; and so had he need to be or we should soon be consumed. He is God, and not man, or our sins would soon drown his love; yet above the mountains of our sins the floods of his mercy rise.

"Plenteous grace with thee is found,

Grace to cover all my sin;

Let the healing streams abound,

Make and keep me pure within."

All the world tastes of his sparing mercy, those who hear the gospel partake of his inviting mercy, the saints live by his saving mercy, are preserved by his upholding mercy, are cheered by his consoling mercy, and will enter heaven through his infinite and everlasting mercy. Let grace abounding be our hourly song in the house of our pilgrimage. Let those who feel that they live upon it glorify the plenteous fountain from which it so spontaneously flows.