Yet it is possible that someone may say: “There are many saints and martyrs who have left behind neither fruits nor foliage, for all these have been lost with them. Neither do we have all the words of the apostles. How can this praise of the blessed man be a general statement?”
I answer: Their word was not their word; “for it is not you who speak, but the Spirit of your Father speaking through you” (Matt. 10:20). All the saints are taught the same Word; therefore they teach the same Word, just as in 1 Cor. 10:4: “All ate the same food and all drank the same drink.” “But the Word of the Lord abides forever” (1 Peter 1:25), and His truth endures throughout all generations. One can also see that this blessed man and this fruitful tree signifies the whole church or all those who are in the preaching ministry. But there is nothing to forbid the application to every righteous man, for he also has the same leaves. H he does not teach others, certainly he teaches himself, meditating in his heart on the Law of God. This Word also remains eternally in him, just as in the whole church. Finally, since all the faithful are one body, even though this leaf belongs only to the one member who speaks through communion it all belongs to them all. For when I preach, it is my word which my tongue preaches, though I am only the ear and not the tongue. So you should also think about the remaining members and the whole body.
Psalms 1 and 2 from Words on the First Twenty-two Psalms, 1519-1521A Composite Translation
Luther’s works, vol. 14:
Selected Psalms III