Who satisfieth thy mouth with good things
With the good things in the heart of God, with his favour and lovingkindness, as with marrow and fatness; with the good things in the hands of Christ, with the fulness of grace in him, with pardon, righteousness, and salvation by him; with the good things of the Spirit of God, his gifts and graces; and with the provisions of the Lord's house, the goodness and fatness of it; these he shows unto his people, creates hungerings and thirstings in them after them, sets their hearts a longing after them, and then fills and satisfies them with them: hence the Septuagint, Vulgate Latin, and Arabic versions render it, "who filleth thy desire with good things": the word used has sometimes the signification of an ornament; wherefore Aben Ezra interprets it of the soul, which is the glory and ornament of the body, and renders it, "who satisfieth thy soul with good things"; which is not amiss: "so that thy youth is renewed like the eagle's"; not the youth of the body, or the juvenile vigour of it; nor the outward prosperity of it; but the youth of grace, or a renewal of spiritual love and affection to divine and heavenly persons and things; of holy zeal for God, his ways and worship; for Christ, his Gospel, truths, and ordinances; of spiritual joy and comfort, strength, liveliness, and activity, as formerly were in the days of espousals, in the youth of first conversion, or when first made acquainted with the best things; so that though the outward man may decay, yet the inward man is renewed day by day: and this is said to be "like the eagle's", whose youth and strength are renewed, as some observe F1, by dropping their feathers, and having new ones, by feeding upon the blood of slain creatures; and whereas, when they are grown old, the upper part of their bill grows over the lower part F2, so that they are not able, to eat, but must die through want; Austin
F1 Ambrosii Opera, tom. 5. p. 78.
F2 Aristot. de Animal. l. 9. c. 32. Plin. Nat. Hist. l. 10. c. 3.
F3 Opera, tom. 8. in Psal. 102. fol. 474. c.