Charles H. Spurgeon on Psalms 86:5

Plenteous in mercy. It is a thing marvellously satisfactory and pleasing to the heart of a man to be still taking from a great heap; and upon this ground are those proverbial sayings, There is no fishing like to a fishing in the sea; no service like the service of a king: because in one there is the greatest plenty and abundance of that kind of pleasure that fishers look after; and for them that serve, and must live by their service, there is none like that of princes, because they have abundance of reward and opportunity whereby to recompense the services of those that do wait and attend upon them. . . . And upon the same ground is it that the Scriptures, in several places, do not only assert and testify that God is merciful and gracious, but abundant in mercy and full of grace; and not simply that there is redemption in him, but plenteousness of redemption: Ps 103:8 130:7 Isa 55:7; "Let the wicked forsake his way", etc.; "Let him return unto the Lord and he will have mercy; and unto our God, for lie will abundantly pardon." The commodity which we stand in need of is mercy and the pardon of our sins, in case we have been unholy and ungodly creatures; this commodity is abundantly in God. There it is treasured up as waters are in the store house of the sea; there is no end of the treasures of his grace, mercy, pardon, and compassion. There is no man, being in want, but had ten times rather go to a rich man's door to be relieved, than to the door of a poor man, if he knoweth the rich man to be as liberal and bountifully disposed as the poor man can be. —John Goodwin.