Why did the angel command Christ to put in his sickle?
Revelation 14:15 (ESV)
15And another angel came out of the temple, calling with a loud voice to him who sat on the cloud, “Put in your sickle, and reap, for the hour to reap has come, for the harvest of the earth is fully ripe.”
Christ Jesus must act the part of the farmer who swings his sickle to fell the standing grain. The reason he must do so is because “the harvest of the earth is fully ripe,” and so it is harvest time.
15 And another angel came out of the temple, calling with a loud voice to him who sat on the cloud, “Put in your sickle, and reap, for the hour to reap has come, for the harvest of the earth is fully ripe.”