[30] But of all bonds, that is the worst which is forged by violence, and which, being violent, is also short-lived; for it is speedily broken by those who are bound in it, since they become restive from their desire for a motion in accordance with nature, to which they hasten; for as the tragic poet says, — [14]"And for things sprung from earth, they must Return unto their parent dust, While those from heavenly seed which rise Are borne uplifted to the skies. Nought that has once existed dies, Though often what has been combined Before, we separated find, Invested with another form."