Blest is the faith, divine and strong. F. W. Faber. [The Christian Life.] Appeared in his Oratory Hymns, 1854, in 6 stanzas of 4 lines, and the chorus, "O Sion's songs are sweet to sing." In the 1855 edition of the Cooke & Denton Hymnal, it was given with alterations to adapt it for use in the Church of England. In this form it is in a limited number of collections, the original being retained in the Roman Catholic hymnals.
-- John Julian, Dictionary of Hymnology (1907)