What is true rest? To rest from sin, from sorrow, from doubt, from care; this is true rest. Above all, to rest from the worst weariness of all -- knowing one's duty and not being able to do it. That is true rest; the rest of God who works for ever, and yet is at rest for ever; as the stars over our heads move for ever, thousands of miles a day, and yet are at perfect rest, because they move orderly, harmoniously, fulfilling the law which God has given them. Perfect rest in perfect work; that surely is the rest of blessed spirits till the final consummation of all things.

Water of Life Sermons. 1867.