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 mourns for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn.
All Commentaries on Zechariah 12:10 Go To Zechariah 12
Augustine of Hippo
AD 430
And perhaps it is then that the words “all flesh” will become more perfectly fulfilled. Now I mean to say, flesh has seen him, but not all flesh. Then, however, at the judgment, as he comes with his angels to judge the living and the dead, “when all who are in tombs hear his voice and come forth, some to the resurrection of life, others to the resurrection of judgment,” it is not only the just but also the wicked, those on the right, these on the left, who will see that form which he pleased to take on for us. Even those who killed him “will look on the one whom they have pierced.” So “all flesh shall see the salvation of God.” Body will be seen by body, because he will come to judge him in his real body. But to those placed on the right and sent on into the kingdom of heaven, he is going to show himself in the same way as he could already be seen in the body; and yet he had said, “Whoever loves me shall be loved by my Father; and I will love him, and manifest myself to him.”