The military is a hierarchy. Boot camp ensures that the recruit obeys his superiors immediately, without question.
The centurion, an important officer in the Roman army, knew that his authority over his soldiers came from his own obedience to his superiors. He saw this same truth in Jesus. He knew that Jesus had the power to heal his servant with a word, because he saw the same rigorous submission in Christ to the Father that he had to his superiors.
Read the whole devotional at the tiny link above.
We live in a region with a lot of military installations. I'm supported by a number of churches near military bases, Abilene TX and North Little Rock AR among them. And, of course, we know friends and family members who serve or have served in the military. So this thought with a military background comes at a good time.