The Commander of the Lord's Army

Joshua 5:
13 When Joshua was by Jericho, he lifted up his eyes and looked, and behold, a man was standing before him with his drawn sword in his hand. And Joshua went to him and said to him, “Are you for us, or for our adversaries?” 14 And he said, “No; but I am the commander of the army of the Lord. Now I have come.” And Joshua fell on his face to the earth and worshiped and said to him, “What does my lord say to his servant?” 15 And the commander of the Lord's army said to Joshua, “Take off your sandals from your feet, for the place where you are standing is holy.” And Joshua did so.

John Gill:
Verse 13. ...and said unto him, [art] thou for us, or for our adversaries? by his appearing in this warlike posture, he concluded it was to take on one side or the other, either on the side of Israel, or of the Canaanites; and he seemed to suspect that it was on the side of the latter, and that he was one that was come to defy the armies of Israel, as Goliath afterwards did, 1 Samuel 17:8; and to engage in a single combat with Joshua their general, and so decide the war; in which, had this been the case, Joshua was ready to fight with him.

Verse 14. And he said, nay,.... Not for or on the side of their adversaries was he come, as Joshua suspected at the first sight of him...

but [as] Captain of the host of the Lord am I now come; of the host of the Lord both in heaven and in earth, angels and men, and particularly of the people of Israel, called the armies and host of the Lord, Exodus 7:4; so that though Joshua was general, Christ was Generalissimo; and so Joshua understood him, and therefore showed a readiness to do whatsoever he should command him; the spiritual Israel of God, the church, is in a militant state, and has many enemies to combat with, sin, Satan, the world, and false teachers; Christ is their Leader and Commander, the Captain of their salvation, and has all necessary qualifications or wisdom, courage, and might, for such an office; see Isaiah 55:4;

and Joshua fell on his face to the earth; in reverence of this divine and illustrious Person, whom he perceived to be what he was:

and did worship; gave him religious worship and adoration, which had he been a created angel he would not have given to him, nor would such an one have received it, Revelation 19:10;

and said unto him, what saith my Lord unto his servant? that is, what commands had he to lay upon him, and he was ready to execute them? he was heartily willing to be subject to him as the chief general of the Israelitish forces, and to consider himself, and behave, as an officer under him, and to obey all orders that should be given.

Verse 15. And the Captain of the Lord's host said unto Joshua,.... As a trial and proof of his obedience to him:

loose thy shoe from off thy foot; which is to be understood literally, as when the like was commanded Moses at Horeb, Exodus 3:5; though some interpret it figuratively; as Abarbinel, "remove from thee such thoughts that thou shall take this city by strength:"

for the place whereon thou standest [is] holy; because of the presence of this Person, and as long as he was there, though afterwards was as another place; the Jewish commentator, last mentioned, thinks this intimates that the city, and all in it (and all round about it), should be "cherem," devoted, and so be holy to the Lord:

and Joshua did so; loosed his shoe from his foot, in obedience to the Captain of the Lord's host, thereby giving proof of his readiness, willingness, and alacrity to serve under him.