Of the sacred poems attributed to him, there is only one short prayer, contained in the hymnal of Sharakan, which can really claim him as its author.
Nearly every modern hymnal contains perhaps a score of his hymns, including "Go, labour on," "I heard the voice of Jesus say," "Here, 0 my Lord, I see Thee face to face," "When the weary, seeking rest."
Schaff's broad views strongly influenced the German Reformed Church, through his teaching at Mercersburg, through his championship of English in German Reformed churches and schools in America, through his hymnal (18J9), through his labours as chairman of the committee which prepared a new liturgy, and by his edition (1863) of the Heidelberg Catechism.
The cultus of Christ became an established usage of the Church; it is recognized in the 1837 edition of the official hymnal, but removed in the edition of 1865.
In the same field of literature Lord Selborne further laboured by the publication of another collection called The Book of Praise Hymnal; a contribution to an edition of Bishop Ken's hymns; a paper on English Church Hymnody at a Church Congress; and the article in the Encyclopaedia Britannica on "Hymns" (q.v.), which was republished as a separate volume in 1892.
But through all the periods of his life his view of the world was essentially religious and subjective, and, consequently, his manner of dealing with it hymnal or lyric. This fact, even more than his merits as an artist, serves to account for his immense popularity.