By Brother Lawrence of the Resurrection:
When we are busied, or meditating on spiritual things, even in our time of set devotion, whilst our voice is rising in prayer, we ought to cease for one brief moment, as often as we can, to worship GOD in the depth of our being, to taste Him though it be in passing, to touch Him as it were by stealth. Since you cannot but know that GOD is with you in all you undertake, that He is at the very depth and centre of your soul, why should you not thus pause an instant from time to time in your outward business, and even in the act of prayer, to worship Him within your soul, to praise Him, to entreat His aid, to offer Him the service of your heart, and give Him thanks for all His loving-kindnesses and tender-mercies?
Brother Lawrence, The Spiritual Maxims of Brother Lawrence, first published ca. 1693, translated from the French and published as The Practice of the Presence of God with Spiritual Maxims, c. 1958, 1967 by Fleming H. Revell, Spire Books, a division of Baker Book House Company, Grand Rapids, MI, pp. 71-72.