“Then I will pour out a spirit of grace and prayer on the family of David and on the people of Jerusalem. They will look on me whom they have pierced and mourn for him as for an only son. They will grieve bitterly for him as for a firstborn son who has died” (Zechariah 12:10 NLT).

The prophet Zechariah wrote around 520 BC. This was 500 years before Christ’s first coming and over 2500 years before the present age. Here, we see a reference to “an only son,” a “firstborn” who the people of Israel will “look on” and finally acknowledge as the long awaited One whom they have “pierced.” Recognizing Him, they will “mourn” and “grieve bitterly,” in repentance.
Notice the unusual use of pronouns that point to the Divine nature of the One they have pierced. God is clearly speaking when He says, “I… will pour out” and then again when He says, “They will look on… ME …whom they have pierced,” but then changes pronouns in the same sentence saying, they will “mourn for… HIM … as for an only Son.” God told them that they would one day recognize the One they had crucified as both “ME” and “HIM.” This is the paradox of the Trinity. For the trinitarian nature of God is seen in Zechariah, as the Spirit and the Son are referenced here by God the Father.
A future day of spiritual awakening will come to the Jewish people before Christ’s return when they will recognize Jesus as Messiah. God has said it. And it will come to pass.