“For I am a man under authority, having soldiers under me: and I say to this man, Go, and he goeth; and to another, Come, and he cometh; and to my servant, Do this, and he doeth it.”
King James Version (KJV)
8:9 For I am a man under authority - I am only an inferior officer: and what I command, is done even in my absence: how much more what thou commandest, who art Lord of all!
Mt 8:9 For I am a man under authority, etc. The meaning is: "If I, in my subordinate station, am obeyed, how much more thou, who art over all, and whom disease serve as their master". As he could say, "Go", to a soldier and was at once obeyed, so Jesus could say, "Go", to the disease, and it would obey him.