Mateus 20:3

And he went out about the third hour, and saw others standing in the market place idle; and to them he said, Go ye also into the vineyard, and whatsoever is right I will give you. And they went their way. And again he went out about the sixth and the ninth hour, and did likewise.

God's invitation to men is constant and not confined to any age or condition of life. Morning, noon, evening and twilight, the Master calls men to work in his vineyard. Notice too the Master's evaluation of the work men do outside the church. Those not working in the vineyard are simply standing around "idle." All is lost except what is done for Christ and at his direction. All frenzied human endeavor is the grossest idleness when contrasted with work in the vineyard of the Lord.