Catena Aurea on John 12:20–26: Augustine of Hippo

But think not for an instant, that by hating thy soul, is meant that thou mayest kill thyself. For wicked and perverse men have sometimes so mistaken it, and have burnt and strangled themselves, thrown themselves from precipices, and in other ways put an end to themselves. This did not Christ teach; nay, when the devil tempted Him to cast Himself down, He said, Get thee hence, Satanb. But when no other choice is given thee; when the persecutor threatens death, and thou must either disobey God’s law, or depart out of this life, then hate thy life in this world, that thou mayest keep it unto life eternal.