O Herre Gott, dein göttlich's Wort, BWV 757

Bach - O Herre Gott, dein göttlich's Wort, BWV 757
It's not sure of Bach actually wrote BWV 757. Gerhard Weinberger writes this about the piece:
"Evaluation of the authenticity of this piece has not reached a clear verdict. In the final analysis, this uncertainty results from the question to what extent Bach tested his skill on stylistic copies during his youth without lending them his own profile. On the other hand, it is undisputed that here the Pachelbel style served as a model. But why should the young Bach, like other musicians too, not have tested and worked out his skill on exempla classica?"
(from booklet notes of CD 19 'Bach - Complete Organ Works)