I think Ezekiel 34 is an excellent explanation of the relationship between Jehovah and Jesus. It says:
Yahweh Will Shepherd His Flock
11 For thus says Lord Yahweh, “Behold, I Myself will seek My sheep and care for them. 12 As a shepherd cares for his herd in the day when he is among his sheep which are spread out, so I will care for My sheep and will deliver them from all the places to which they were scattered on a cloudy and gloomy day. 13 I will bring them out from the peoples and gather them from the countries and bring them to their own land; and I will shepherd them on the mountains of Israel, by the streams, and in all the inhabited places of the land. 14 I will shepherd them in a good pasture, and their grazing ground will be on the mountain heights of Israel. There they will lie down on good grazing ground and be shepherded in rich pasture on the mountains of Israel. 15 I will shepherd My flock, and I will make them lie down,” declares Lord Yahweh. 16 “I will search for the lost, bring back the scattered, bind up the broken, and strengthen the sick; but the fat and the strong I will destroy. I will shepherd them with judgment.
17 “As for you, My flock, thus says Lord Yahweh, ‘Behold, I will judge between one sheep and another, between the rams and the male goats.18 Is it too slight a thing for you that you should beshepherded in the good pasture, that you must tread down with your feet the rest of your pastures? Or that you should drink of the clear waters, that you must foul the rest with your feet? 19 As for My flock, they must be shepherded on what you tread down with your feet and drink what you foul with your feet!’”
20 Therefore, thus says Lord Yahweh to them, “Behold, I, even I, will judge between the fat sheep and the lean sheep. 21 Because you push with side and with shoulder, and thrust at all the sickly with your horns until you have scattered them abroad, 22 therefore, I will save My flock, and they will no longer be plunder; and I will judge between one sheep and another.
23 “Then I will establish over them one shepherd, My servant David, and he will shepherd them; he will shepherd them himself and be their shepherd.24 And I, Yahweh, will be their God, and My servant David will be prince among them; I, Yahweh, have spoken.
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It says that Jehovah is the shepherd and he looks after his sheep. Then it says that how he does this is through his “servant David” who “will himself be their shepherd”. And the conclusion is that Jehovah is their “God” and his servant David will be “prince among them”. I don’t know how much clearer you can get than that.
When Jesus said “I am the fine shepherd” (John 10) he was claiming to be the Davidic messiah prophesied in Ezekiel, God’s servant.
Jehovah “will be their God” and that the messiah is God’s servant. This is the conclusion that JWs and other non Trinitarians draw from the plain meaning of such verses. The idea that what such passages really mean to say is that God and his servant are two co-equal and co-eternal persons within the one being of God is nowhere even hinted at in the text.