The frail body, also, even though we can accomplish nothing without it, is to be regarded as necessary rather than as important; it involves us in vain pleasures, short-lived, and soon to be regretted, which, unless they are reined in by extreme self-control, will be transformed into the opposite. This is what I mean: pleasure, unless it has been kept within bounds, tends to rush headlong into the abyss of sorrow.
