Proverbs 30:17 (ESV)

17 The eye that mocks a father and scorns to obey a mother will be picked out by the ravens of the valley and eaten by the vultures.

Our eyes were not made to provide ravens and eagles with food any more than they were made to be perversely and cynically focused upon authority in general, and parents in particular. Yet when we scorn those who are the natural sources and supports of our lives, we are destined for a living death, wherein our spiritually lifeless bodies will only be food for the parasites and animals of prey. How fearfully we should view rebellion against legitimate authority!