Charles H. Spurgeon on Psalms 92:14

They shall still bring forth fruit in, old age. The point on which the Psalmist in this passage fixes, as he contemplates the blessedness of God's own children, is the beauty and happiness of their old age. The court or open area in the centre of an eastern dwelling, and especially the court of any great and stately dwelling, was often adorned with a tree, or sometimes with more than one, for beauty, for shade, and, as it might be, for fruit. There sometimes the palm tree, planted by the cool fountain, shot up its tall trunk toward the sky, and waved its green top, far above the roof, in the sunlight and the breeze. There sometimes the olive, transplanted from the rocky hill side, may have flourished under the protection and culture of the household, and may have rewarded their care with the rich abundance of its nutritious berries. With such images in his mind, the Psalmist, having spoken of the brief prosperity of the wicked, and having compared it with the springing and flourishing of the grass, which grows to its little height only to be immediately cut down, naturally and beautifully compares the righteous, not with the deciduous herbage, but with the hardy tree that lives on through the summer's drought and the winter's storms, and from season to season still renews its growth. These trees of righteousness, as the poet conceives of them, are "planted in the house of the Lord"; they stand fair and "flowering in the courts of our God" —even "in old age they bring forth fruit" —they are "full of sap and flourishing" —they are living memorials "to show that the Lord is faithful", and that those who trust in him shall never be confounded. —Leonard Bacon, 1845.