Continue in thy work. Thou who art a minister, it is a work for thy lifetime; and not to be taken up and laid down again, according as it may best suit a man's carnal inclinations, and outward conveniences. The apostles that laboured with their hands, have, by that example, set the conscience of a minister at liberty, to provide for the necessities of this life by other employments, when he cannot live of the gospel; yet certainly no man that is called of God to this work, can with a safe conscience abandon it wholly. Paul, for example rather, than necessity, both preached, and wrought in a handy-craft. As preaching doth not make working unlawful, so neither should any other business of a minister make preaching cease.
--Robert Traill, taken from his Works, Vol I, p.236