To continue in the Kingdom of God becomes burdensome to them, to the point of despair.
Sweat is the result of excessive physical and emotional exertion.
In the biblical context, it is illustrative of the energy of the mature man trying to accomplish the work of God, and achieve the maximum amount of productivity in their souls, not through sweat but rest. And now, O inhabitants of Jerusalem, and men of Judah, judge, I pray you, betwixt me and my vineyard. Presented by the Institute for Creation Research.