…the peace of God is not enough to a gracious heart except it may have the God of that peace. A carnal heart could be satisfied if he might but have outward peace, though it is not the peace of God; peace in the state, and his trading, would satisfy him. But mark how a godly heart goes beyond a carnal. All outward peace is not enough; I must have the peace of God. But suppose you have the peace of God. Will that not quiet you? No, I must have the God of peace; as the peace of God so the God of peace. That is, I must enjoy that God who gives me the peace; I must have the Cause as well as the effect. I must see from whence my peace comes, and enjoy the Fountain of my peace, as well as the stream of my peace. And so in other mercies: have I health from God? I must have the God of my health to be my portion, or else I am not satisfied. It is not life, but the God of my life; it is not riches, but the God of those riches that I must have, the God of my preservation, as well as my preservation.
In Psalm 73:25, ‘Whom have I in heaven but thee, and there is none upon the earth that I desire beside thee.’ There is nothing in heaven or earth that can satisfy me, but yourself. If God gave you not only earth but heaven, that you should rule over sun, moon and stars, and have the rule over the highest of the sons of men it would not be enough to satisfy you, unless you had God himself. There lies the first mystery of contentment. And truly a contented man, though he is the most contented man in the world, is the most dissatisfied man in the world; that is, those things that will satisfy the world will not satisfy him.
-Jeremiah Burroughs, The Rare Jewel of Christian Contentment