Labor not to be rich.
The Old and the New Testaments have warnings in them of the dangers involved in devotedness to riches. True riches are what God gives inside your heart, not what you get for yourself and show off outside. Many a man has spent ceaseless hours, months, years of labor to be rich and come home to find his family in shambles. Give your energy, instead, to the Lord and His work, and to your family.