Notes on Book of Psalms (Author Bishop Richard Challoner (ed.))
101:2 I will understand, etc: That is, I will apply my mind, I will do my endeavour, to know and to follow the perfect way of thy commandments: not trusting to my own strength, but relying on thy coming to me by thy grace.
Original Douay-Rheims from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.