be happy with God, and when you are not happy with him, your mind will be taken off from work for him to work for yourself. You will be thinking about your own imperfection rather than his perfection: the sin of any single day, though it will not destroy you, will grieve you. A stone in your shoe, though almost invisible, will spoil a day’s journey. It is not a great rock to grind you to powder; it is only a little stone, but your foot will blister before you have walked many miles. Ah me, how great