in hunger and thirst, in nakedness and utter want, you will serve the enemies whom the Lord will send against you. He will put an iron yoke on your neck, until he destroys you. Invasion and Siege.
Emaciating hunger and consuming fever and bitter pestilence, And the teeth of wild beasts I will send among them, with the venom of reptiles gliding in the dust.
for, while physical training is of limited value, devotion is valuable in every respect, since it holds a promise of life both for the present and for the future.