A man cannot really be religious one hour, and not religious the next. We might as well say he could be in a state of good health one hour, and in bad health the next. A man who is religious, is religious morning, noon, and night; his religion is a certain character, a mould in which his thoughts, words, and actions are cast, all forming parts of one and the same whole. He sees God in all things; every course of action he directs towards those spiritual objects which God has revealed to him; every occurrence of the day, every event, every person met with, all news which he hears, he measures by the standard of God’s will. And a person who does this may be said almost literally to pray without ceasing; for, knowing himself to be in God’s presence, he is continually led to address Him reverently, whom he sets always before him, in the inward language of prayer and praise, of humble confession and joyful trust.
All this, I say, any thoughtful man acknowledges from mere natural reason. To be religious is, in other words, to have the habit of prayer, or to pray always. This is what Scripture means by doing all things to God’s glory; that is, so placing God’s presence and will before us, and so consistently acting with a reference to Him, that all we do becomes one body and course of obedience, witnessing without ceasing to Him who made us, and whose servants we are; and in its separate parts promoting more or less directly His glory, according as each particular thing we happen to be doing admits more or less of a religious character.
Mental Prayer PPS VII p. 205-206 on 13th December, 1829