In the most deafening confusion of battle, it would be able to feel and respond to the gentle nudge of his master’s knee or heel, which would direct it to turn or change its pace. This will be the discipline of the last day ministry. Regardless of the confusion and noise of battle, the disciples of Christ will be so much in touch with the Master that they will feel and respond to His most gentle nudging.
To be numbered in the coming army of the Lord will require training and spiritual discipline exceeding the physical and mental discipline required of elite military units. Imagine a warhorse. In infancy this creature would be wild and easily frightened into spontaneous and uncontrolled reactions. After proper training it would be able to charge into the face of cannons, rifles and swords and yet never lose its composure.