Notes on Book of Psalms (Author Bishop Richard Challoner (ed.))
78:2 Propositions: Deep and mysterious sayings. By this it appears that the historical facts of ancient times, commemorated in this psalm, were deep and mysterious: as being figures of great truths appertaining to the time of the New Testament.
Original Douay-Rheims from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.