He cometh. He who loveth us and cleansed us and made us to be a kingdom will assuredly come. While interpreting the verse of the second advent, we need not exclude the coming to "those who pierced him" in the destruction of Jerusalem, and to "the tribes of the earth" in the breakup of the Roman empire.
With the clouds. This probably refers to Mark 14:62, "Ye shall see the Son of man … coming with the clouds of heaven" (comp. Daniel 7:13, "Behold, one like the Son of man came with the clouds of heaven").
Aquinas and other writers make the clouds symbolize the saints, "who rain by preaching, glisten by working miracles, are lifted up by refusing earthly things, fly by lofty contemplation." And they also; better, and all they who ( οἵτινες) pierced him.
This is strong evidence of common authorship between the Fourth Gospel and the Apocalypse.