Blessed Theodoret on the Psalms

Blessed Theodoret of Cyr ca. 393-457

Some say that not all the Psalms are by David, but that some are by others… About this I make no very strong affirmation. What difference does it make to me whether all of them or some of them [are David’s], when it is clear in any case that all are written under the operation of the Divine Spirit? (Interpretation of the Psalms, Preface)