The Psalms of David
"I come therefore to explain my own design, which is this, To accommodate the book of Psalms to Christian worship. And in order to do this, it is necessary to divest David and Asaph, &c. of every other character but that of a psalmist and a saint, and to make them always speak the common sense, and language of a Christian.
"Attempting the work with this view, I have entirely omitted several whole psalms, and large pieces of many others; and have chosen out of all of them, such parts only as might easily and naturally be accommodated to the various occasions of the Christian life, or at least might afford us some beautiful allusion to Christian affairs. These I have copied and explained in the general style of the gospel; nor have I confined my expressions to any particular party or opinion; that in words prepared for public worship, and for the lips of multitudes, there might not be a syllable offensive to sincere Christians, whose judgments may differ