Zechariah 12:10-14 from the King James Version (KJV) reads: "And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn. In that day shall there be a great mourning in Jerusalem, as the mourning of Hadadrimmon in the valley of Megiddon. And the land shall mourn, every family apart; the family of the house of David apart, and their wives apart; the family of the house of Nathan apart, and their wives apart; The family of the house of Levi apart, and their wives apart; the family of Shimei apart, and their wives apart; All the families that remain, every family apart, and their wives apart."

This passage from the book of Zechariah is part of a prophecy regarding the end times and the eventual restoration of Israel. In these verses, God promises to pour out His spirit of grace and supplication on the house of David and the inhabitants of Jerusalem. This outpouring of the Spirit will bring about a profound sense of mourning and repentance among the people.

The verse then goes on to describe the cause of this mourning: "they shall look upon me whom they have pierced." This imagery of looking upon the one they have pierced is a clear reference to Jesus Christ and His crucifixion. The piercing mentioned here most likely refers to the wound inflicted on Jesus' side when He was crucified.

The people's reaction to this revelation is one of deep mourning, likened to the mourning for an only son or a firstborn. This level of grief emphasizes the magnitude of the revelation and the impact it has on the people. It is a recognition of the gravity of their rejection and crucifixion of the Messiah.

The mention of "the mourning of Hadadrimmon in the valley of Megiddon" alludes to a historical event of great mourning, possibly referring to the death of King Josiah, who was killed in battle at Megiddo. This reference serves to accentuate the intensity and widespread nature of the mourning that will occur in Jerusalem.

The subsequent verses list specific families who will mourn, emphasizing that this profound grief will be felt by all, regardless of their social status. The mention of the house of David, the house of Nathan, the house of Levi, and the house of Shimei underscores the universality of this repentant mourning.

From a thematic standpoint, this passage speaks to the themes of repentance, redemption, and restoration. The outpouring of the Spirit of grace and supplication signifies a turning of hearts towards God, leading to a deep sense of remorse and the collective acknowledgment of their rejection of the Messiah. This mourning is not without hope, as it ultimately leads to the restoration and redemption of Israel.

In a broader context, this passage also ties in with the larger biblical narrative of God's plan for salvation. The piercing of Jesus and the subsequent mourning of the people are part of God's redemptive plan for humanity. The recognition of their role in Jesus' crucifixion ultimately leads to repentance and paves the way for the ultimate restoration and reconciliation with God.

Symbolically, the piercing of Jesus represents the wounds of sin that each person inflicts on Christ through their transgressions. The mourning that follows symbolizes the genuine repentance and sorrow for these sins. The specificity of the families mentioned further underscores the personal nature of this repentance and the need for individual introspection and contrition.

In conclusion, Zechariah 12:10-14 from the KJV conveys a powerful message of repentance, redemption, and restoration. It serves as a reminder of the profound impact of Jesus' sacrifice and the transformative power of grace. The sorrowful mourning described in these verses ultimately leads to a hopeful future, as it signifies the turning of hearts and the eventual reconciliation with God.