“The Psalter ought to be a precious and beloved book, if for no other reason than this: it promises Christ’s death and resurrection so clearly—and pictures His kingdom and the condition and nature of all Christendom—that it might well be called a little Bible. In it is comprehended most beautifully and briefly everything that is in the entire Bible.
In fact, I have a notion that the Holy Spirit wanted to take the trouble Himself to compile a short Bible and book of examples of all Christendom or all saints, so that anyone who could not read the whole Bible would here have anyway almost an entire summary of it, comprised in one little book…
A human heart is like a ship on a wild sea, driven by the storm winds from the four corners of the world. Here it is stuck with fear and worry about impending disaster; there comes grief and sadness because of present evil. Here breathes a breeze of hope and of anticipated happiness; there blows security and joy in present blessings.
These storm winds teach us to speak with earnestness, to open the heart and pour out what lies at the bottom of it. He who is stuck in fear and need speaks of misfortune quite differently from him who floats on joy; and he who floats on joy speaks and sings of joy quite differently from him who is stuck in fear. When a sad man laughs or a glad man weeps, they say, he does not do so from the heart; that is, the depths of the heart are not open, and what is in them does not come out.
What is the greatest thing in the Psalter but this earnest speaking amid these storm winds of every kind? Where does one find finer words of joy than in the psalms of praise and thanksgiving?
There you look into the hearts of all the saints, as into fair and pleasant gardens, yes, as into heaven itself. There you see what fine and pleasant flowers of the heart spring up from all sorts of fair and happy thoughts toward God, because of his blessings.
On the other hand, where do you find deeper, more sorrowful, more pitiful words of sadness than in the psalms of lamentation? There again you look into the hearts of all the saints, as into death, yes, as into hell itself.
How gloomy and dark it is there, with all kinds of troubled forebodings about the wrath of God! So, too, when they speak of fear and hope, they use such words that no painter could so depict for you fear or hope, and no other orator so portray them.
And that they speak these words to God and with God, this, I repeat, is the best thing of all. This gives the words double earnestness and life. For when men speak with men about these matters, what they say does not come so powerfully from the heart; it does not burn and live, is not so urgent.
Hence it is that the Psalter is the book of all saints; and everyone, in whatever situation he may be, finds in that situation psalms and words that fit his ease, that suit him as if they were put there just for his sake, so that he could not put it better himself, or find or wish for anything better.
This also serves well another purpose. When these words please a man and fit his case, he becomes sure that he is in the communion of saints, and that it has gone with all the saints as it goes with him, since they all sing with him one little song. It is especially so if he can speak these words to God, as they have done; this can only be done in faith.
There is in the Psalter security and a well-tried guide, so that in it one can follow all the saints without peril… For it teaches you in joy, fear, hope, and sorrow to think and speak as all the saints have thought and spoken.
In a word, if you would see the holy Christian Church painted in living color and shape, comprehended in one little picture, then take up the Psalter. There you have a fine, bright, pure mirror that will show you what Christendom is…
To this may God the Father of all grace and mercy help us, through Jesus Christ our Lord, to whom be praise and thanks, honor and glory, for this German Psalter and for all his innumerable and unspeakable blessings to all eternity. Amen, Amen.”
–Martin Luther, Luther’s Works, Vol. 35: Word and Sacrament I (ed. Jaroslav Jan Pelikan, Hilton C. Oswald, and Helmut T. Lehmann; vol. 35; Philadelphia: Fortress Press, 1999), 254–257.