Sadness discolors everything; it leaves all objects charmless; it involves future prospects in darkness; it deprives the soul of all its aspirations, enchains all its powers, and produces a mental paralysis!

An old believer remarked, that cheerfulness in religion makes all its services come off with delight; and that we are never carried forward so swiftly in the ways of duty as when borne on the wings of delight; adding, that Melancholy clips such wings; or, to alter the figure, takes off our chariot wheels in duty, and makes them, like those of the Egyptians, drag heavily.

from: Satan’s Tools