And we know that God causes all things to work together for good to those who love God, to those who are called according to His purpose (Rom 8:28).
In Thomas Watson’s preface in 1663 to his exposition of Romans 8:28, he wrote, “There are two things which I have always looked upon as difficult. The one is, to make the wicked sad; the other is, to make the godly joyful. Dejection in the godly arises from a double spring; either because their inward comforts are darkened, or their outward comforts are disturbed. To cure both these troubles, I have put forth this ensuing piece, hoping, by the blessing of God, that it will buoy up their despondent hearts, and make them look with a more pleasant aspect. I would prescribe them to take, now and then, a little of this cordial: All things work together for good to them that love God. To know that nothing hurts the godly, is a matter of comfort; but to be assured that all things which fall out shall co-operate for their good, that their crosses shall be turned into blessings, that showers of affliction water the withering root of their grace and make it flourish more; this may fill their hearts with joy till they run over.” (quoted from. “All Things for Good,” Banner of Truth Magazine, 695-696.)