For he satisfieth the longing soul - This does not mean - what is indeed true in itself - that God has made provision for the "soul" of man, and satisfies it when it longs or pants for its needed supply, but the reference is to the creatures of God - the living things that he has made; and the idea is, that he has made provision for their needs. He gives them food and drink, so that their needs are met. The "particular" reference here, however, in the word rendered "longing" is to "thirst," as contradistinguished from the other member of the verse, where the reference is to "hunger." So the word is used in Isaiah 29:8.
And filleth the hungry soul with goodness - Supplies the needs of the hungry with "good;" that is, with that which is "good" for it; which meets its needs, and imparts strength and happiness.

For he satisfieth the longing soul - This is the reason which the psalmist gives for the duty of thankfulness which he prescribes. The longing soul, נפש שוקקה nephesh shokekah, the soul that pushes forward in eager desire after salvation.

For he satisfieth the longing soul,.... The soul that is hungry and thirsty, and longs for food and drink, when nature in such circumstances craves. And so such who long for Christ and his grace, for an interest in him, and fellowship with him, the Lord satisfies with these things, as with marrow and fatness.
And filleth the hungry soul with goodness; with the goodness and fatness of his house; with good things; with the good things laid up in Christ and in the covenant; with the good things of the Gospel; with the grace and goodness of God in Christ; see Psalm 65:4.