A White Cloud - Revelation 14:14-16

Revelation 14:14-16 ESV 

Then I looked, and behold, a white cloud, and sitting on the cloud was one like a son of man, having a golden crown on His head and a sharp sickle in His hand. And another angel came out of the temple, crying out with a loud voice to Him who sat on the cloud, “ Put in your sickle and reap, for the hour to reap has come, because the harvest of the earth is ripe.” Then He who sat on the cloud swung His sickle over the earth, and the earth was reaped.

Through out Scripture God has interacted with man through the medium of clouds. From leading Israel in the desert to the promise of Christ's return in the clouds. 

Christ is depicted here on a white cloud. He awaits word from the Father before reaping the harvest of the earth, then does so. The harvest are those whose names are written in the book of life. The fullness of the time of the Gentiles has been fulfilled. The harvest of the earth is complete. The seed of the word has responded to the light of the Lord.