Trinity and the Old Testament

With the upcoming Easter season comes many skeptics about the gospel message and the Divinity of Jesus. The Old Testament give us many hints to God being a Trinity. We as Christians looking back have the advantage, but might have been more difficult for the ancient Israelites to see that God was a plurality of persons before Jesus came.

First let's look at Genesis 1:26-27 - Then God said, "Let us make man in our image, after our likeness; … 27 So God created man in his own image, in the image of God he created him; male and female he created them.

Jehovah’s Witnesses would say that he is talking to the pre-incarnate Jesus here but that he was not divine, but the context and a little examination give us the true answer.

If I said to you Dude, let us make a statue in our image, but after all the work was done, it only looked like me. Then it wasn’t made in OUR image was it? It was just in MY image.
Listen to Genesis again Then God said, "Let us make man in our image, after our likeness; … 27 So God created man in his own image, in the image of God he created him; male and female he created them.

Man isn'tt in the image of both God and Michael the archangel as the Jehovah’s witnesses would have us believe, Man is in the image of God alone. So backing us when God said, Let US make man in our image. One person of the Trinity was talking with another. Because we are made only in the image of God.

Even before this in the very beginning of Genesis there are a few hits of the Trinity, when it says:
Genesis 1:1-3 In the beginning God created the heavens and the earth…the Spirit of God was moving over the face of the waters. 3 And God SAID, "Let there be light"; and there was light.
So in the beginning there is the Father, and the Spirit and the Father speaks the word- the Son.

More hints of the Trinity
Dr. Brant Pitre has suggested something very obvious and beautiful.
That in the Tabernacle (which was Israel’s portable Temple while in the desert) were signs of the Trinity because in the tabernacle were three things.
In the Holy of Holies was Ark where God sat. Then in the Holies was two more things: A table with bread and wine, called the bread and wine of the presence, and the menorah which was a seven candle stick tree looking thing, everyone knows what they look like.
So behind the veil is the Father, and bread represents Jesus and the Eucharist of course and this seven branched candelabra with tongues of fire on it represents the Holy Spirit.

St. Paul in the book of Hebrews attributes Psalm 45 to God the Father speaking to the son when he says: Psalm 45:7 Therefore God, your God, has anointed you with the oil of gladness above your fellows;

Another verse that I sort of stumbled upon was 1 Samuel 2:25. Eli has these two priest sons that are causing scandal and he says to them:
1 Samuel 2:25 25 If a man sins against a man, God will mediate for him; but if a man sins against the LORD, who can intercede for him?"
Eli is implying that no one can intercede for someone else who has offended God. Well we know that all sins offend God. And we must need someone greater than man to intercede for us that is what God the Son became man and died for us, so that we have a permanent intercessor.

Finally Zechariah 12:10 10 "And I (Yahweh) will pour out on the house of David and the inhabitants of Jerusalem a spirit of compassion and supplication, so that, when they look on ME whom they have pierced, they shall mourn for him, as one mourns for an only child, and weep bitterly over him, as one weeps over a first-born.
Now some translations say they will look upon HIM whom they have pierced, but both the Greek and the Hebrew are clear that it should be - me they have pierced, and John sees this fulfilled in: John 19:37.

I am sure there are more, but that is enough for now.