Charles H. Spurgeon on Psalms 145:19

He will fulfil the desire of them that fear him. God will not grant us every desire, that is our mercy; for, 1. Some of them are sinful. David desired to be revenged on Nabal and his innocent family. Jonah desired Nineveh's ruin. 2. Others would not be for our good. David desired the life of the child he had by Bathsheba; David also desired the life of Jonathan; neither of which would have been for his good. Nay, not every righteous desire. It is a righteous desire for a minister to desire the salvation of those that hear him. So Paul declared, "I would to God that all that are here present were altogether such as I am": Ac 26:29. So again, "I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh": Ro 9:1. David desired to build a house for God, and it was a righteous desire, for God took it well at his hands; yet he did not grant it. Kings and prophets desired to see the Lord Messiah, and yet did not see him. How then are we to understand it? Answer. The sum or substance of their desires shall be fulfilled. What is the main desire of a seaman? that he may arrive at the haven. So saints will be brought to their desired haven. What of a pilgrim? See Heb 11:16. So all the desires of a Christian are summed up in this, That he may eternally enjoy God and be like him. Doubtless there is great mystery in these things. However, I think it is certain that, when God raises a spiritual desire in a person, it is often, though not always, with an intention to bestow the object desired. —Andrew Fuller.