Whatever you do, work heartily, as for the Lord and not for men. – Colossians 3:23

The genuine Christian lives for God. He makes the first object of all that he does the glory of God, the extension of the Redeemer’s kingdom, the showing forth of His praise, who has brought him out of darkness into marvellous light. He is a young man, an apprentice; he has been converted, and he says, “Now, what can I do while I am in this house to make it better, to make it happier and holier, that men may see what the religion of Jesus is? How can I recommend my Lord and Master to those among whom I dwell-to my master and my mistress, and my fellow-servants?” He becomes a tradesman on his own account, and when he opens that shop-door he says, “I do not mean to trade for myself, I will make this to be my object, that this shall be God’s shop; God has got to keep me; He has promised that He will; therefore, I may take what I want for the daily subsistence of myself and my children; but I will keep the shop for God for all that, and if He prospers me, I will give Him of my substance; but whatever comes of it, I will so trade across my counter, so keep those books, and manage those bills, that I will let the world see what a Christian trader is, and I will seek thus to recommend my Lord and my God, and my object shall be to make Him famous.”

He seeks the Lord on Sundays. He desires at the Sunday-school, or the preaching-station, or anywhere he may serve, to be glorifying God. But he equally seeks Him on Mondays and other weekdays, for he believes there is a way of turning over calicoes, weighing pounds of tea, ploughing acres of land, driving a cart, or whatever else he may be called to do, by which he can honour God, and cause others to honour him. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3409.cfm