[9.] But (one says) what harm is there in laughter? There is no harm in laughter; the harm is when it is beyond measure, and out of season. Laughter has been implanted in us, that when we see our friends after a long time, we may laugh; that when we see any persons downcast and fearful, we may relieve them by our smile; not that we should burst out violently and be always laughing. Laughter has been implanted in our soul, that the soul may sometimes be refreshed, not that it may be quite relaxed. For carnal desire also is implanted in us, and yet it is not by any means necessary that because it is implanted in us, therefore we should use it, or use it immoderately: but we should hold it in subjection, and not say, Because it is implanted in us, let us use it.