The Shepherd King
King David was not a priest. He was a king and a military commander. Where did he learn to fight, and to lead a group of followers? David was a shepherd. He defended his father's flocks against some animals that were as fierce and deadly as any human attacker.
"17:34 And David said unto Saul, Thy servant kept his father's sheep, and there came a lion, and a bear, and took a lamb out of the flock:
17:35 And I went out after him, and smote him, and delivered it out of his mouth: and when he arose against me, I caught him by his beard, and smote him, and slew him. 17:36 Thy servant slew both the lion and the bear: and this uncircumcised Philistine shall be as one of them, seeing he hath defied the armies of the living God. 17:37 David said moreover, The LORD that delivered me out of the paw of the lion, and out of the paw of the bear, he will deliver me out of the hand of this Philistine." (1 Samuel 17:34-37 KJV)
David also maintained an orderly structure in the "kingdom" of his father's pastures (just as Christ has been sent to do in His Father's "pastures"). When the time came for him to rule people, he had developed a deep sense of responsibility and compassion for those to whom he was to serve as their leader. The LORD declared what happens when people have no "shepherd."
"17:6 In those days there was no king in Israel, but every man did that which was right in his own eyes." (Judges 17:6 KJV)
"22:17 And he said, I saw all Israel scattered upon the hills, as sheep that have not a shepherd: and the LORD said, These have no master ..." (1 Kings 22:17 KJV)
"David my servant shall be king over them; and they all shall have one shepherd"
King David (see the entire series Israelite Monarchy - The Origin, The Civil War, The United Kingdom, The Division Of Israel, The Northern Kingdom, The Southern Kingdom and The Messiah) was a prefigure of Jesus Christ in a number of ways, including shepherd ("10:11 I am the good shepherd: the good shepherd giveth his life for the sheep" John 10:11 KJV) and king ("17:14 These shall make war with the Lamb, and the Lamb shall overcome them: for he is Lord of lords, and King of kings: and they that are with him are called, and chosen, and faithful" Revelation 17:14 KJV). But, ironically, much of physical Israel never understood the purpose of Israel (see also Why Can't 'The Chosen People' See?). That is yet to come. David will, then, again, be responsible for those "sheep" - to bring them along to the greater shepherd, the Messiah (see the Fact Finder question below).
"37:1 The hand of the LORD was upon me [i.e. Ezekiel The Prophet], and carried me out in the spirit of the LORD, and set me down in the midst of the valley which was full of bones, 37:2 And caused me to pass by them round about: and, behold, there were very many in the open valley; and, lo, they were very dry.
37:3 And he said unto me, Son of man, can these bones live?
And I answered, O Lord GOD, thou knowest.
37:4 Again he said unto me, Prophesy upon these bones, and say unto them, O ye dry bones, hear the word of the LORD [see 'Before Abraham Was, I AM']. 37:5 Thus saith the Lord GOD unto these bones; Behold, I will cause breath to enter into you [see The Spirit Of God], and ye shall live: 37:6 And I will lay sinews upon you, and will bring up flesh upon you, and cover you with skin, and put breath in you, and ye shall live; and ye shall know that I am the LORD.
37:7 So I prophesied as I was commanded: and as I prophesied, there was a noise, and behold a shaking, and the bones came together, bone to his bone. 37:8 And when I beheld, lo, the sinews and the flesh came up upon them, and the skin covered them above: but there was no breath in them.
37:9 Then said he unto me, Prophesy unto the wind, prophesy, son of man, and say to the wind, Thus saith the Lord GOD; Come from the four winds, O breath, and breathe upon these slain, that they may live. 37:10 So I prophesied as he commanded me, and the breath came into them, and they lived [see Resurrections], and stood up upon their feet, an exceeding great army.
37:11 Then he said unto me, Son of man, these bones are the whole house of Israel: behold, they say, Our bones are dried, and our hope is lost: we are cut off for our parts. 37:12 Therefore prophesy and say unto them, Thus saith the Lord GOD; Behold, O my people, I will open your graves, and cause you to come up out of your graves [see Sheol and Hades; also Through The Gates Of Hell], and bring you into the land of Israel. 37:13 And ye shall know that I am the LORD, when I have opened your graves, O my people, and brought you up out of your graves, 37:14 And shall put my spirit in you, and ye shall live, and I shall place you in your own land: then shall ye know that I the LORD have spoken it, and performed it, saith the LORD.
37:15 The word of the LORD came again unto me, saying, 37:16 Moreover, thou son of man, take thee one stick, and write upon it, For Judah, and for the children of Israel his companions: then take another stick, and write upon it, For Joseph, the stick of Ephraim, and for all the house of Israel his companions: 37:17 And join them one to another into one stick; and they shall become one in thine hand [see The Gathering of Israel and Judah].
37:18 And when the children of thy people shall speak unto thee, saying, Wilt thou not show us what thou meanest by these? 37:19 Say unto them, Thus saith the Lord GOD; Behold, I will take the stick of Joseph, which is in the hand of Ephraim, and the tribes of Israel his fellows, and will put them with him, even with the stick of Judah, and make them one stick, and they shall be one in mine hand.
37:20 And the sticks whereon thou writest shall be in thine hand before their eyes.
37:21 And say unto them, Thus saith the Lord GOD; Behold, I will take the children of Israel from among the heathen, whither they be gone, and will gather them on every side, and bring them into their own land: 37:22 And I will make them one nation in the land upon the mountains of Israel; and one king shall be king to them all [see Zionism]: and they shall be no more two nations, neither shall they be divided into two kingdoms any more at all: 37:23 Neither shall they defile themselves any more with their idols, nor with their detestable things, nor with any of their transgressions: but I will save them out of all their dwellingplaces, wherein they have sinned, and will cleanse them: so shall they be my people, and I will be their God.
37:24 And David my servant shall be king over them; and they all shall have one shepherd: they shall also walk in my judgments, and observe my statutes, and do them. 37:25 And they shall dwell in the land that I have given unto Jacob my servant, wherein your fathers have dwelt; and they shall dwell therein, even they, and their children, and their children's children for ever: and my servant David shall be their prince for ever. 37:26 Moreover I will make a covenant [see Covenant and Testament] of peace with them; it shall be an everlasting covenant with them: and I will place them, and multiply them, and will set my sanctuary in the midst of them for evermore. 37:27 My tabernacle also shall be with them: yea, I will be their God, and they shall be my people. 37:28 And the heathen shall know that I the LORD do sanctify Israel, when my sanctuary shall be in the midst of them for evermore." (Ezekiel 37:1-28 KJV)
Fact Finder: What will King David be doing in the Kingdom of God? Why?
See David, Future King Of Israel