Authors:

Carefully study the well-being of your men, and do not overtax them. Concentrate your energy and hoard your strength. Keep your army continually on the move, and devise unfathomable plans.

Lionel Giles', Sun Tzu (1910). “Sun Tzu's Art of War - Illustrated & Translated for Modern Readers”, p.32, SJ Creations Tokyo
Carefully study the well-being of your men, and do not overtax them. Concentrate your energy and hoard your strength. Keep your army continually on the move, and devise unfathomable plans.