Christ empowers His disciples to preach and heal. He is saying there will be an incomplete work of healing and preaching in the run-up to His return.
The Ephesus church effectively battled various heresies, for which Christ commends it. However, the members lost sight of the reason, having left their first love.
Richard Ritenbaugh warns that these laments contain little that is jovial or uplifting, but instead are saturated in despair, sorrow, mourning, and even recrimination against God on the part of a personified Jerusalem, whom God depicts as a grieving widow,. . .
Sanctification is an incremental process in which we systematically destroy the sin within us as our forebears were asked to destroy the inhabitants of Canaan.