To a man who lives unto God nothing is secular, everything is sacred. He puts on his workday garment and it is a vestment to him. He sits down to his meal and it is a sacrament. He goes forth to his labor, and therein exercises the office of the priesthood. His breath is incense and his life a sacrifice. He sleeps on the bosom of God, and lives and moves in the divine presence.
To draw a hard and fast line and say, “This is sacred and this is secular,” is, to my mind, diametrically opposed to the teaching of Christ and the spirit of the gospel. Paul has said, “I know, and am persuaded by the Lord Jesus, that there is nothing unclean of itself” [Romans 14:14]. Peter also saw a sheet let down from heaven in which were all manner of beasts and four-footed creatures, which he was bidden to kill and eat, and when he refused because they were unclean, he was rebuked by a voice from heaven, saying, “What God hath cleansed that call not thou common” [Acts 10:15; 11:9].
The Lord hath cleansed your houses, he has cleansed your bed chambers, your tables, your shops, he has made the bells upon your horses holiness to the Lord, he has made the common pots and pans of your kitchens to be as the bowls before the altar, if you know what you are and live according to your high calling. You housemaids, you cooks, you nurses, you ploughmen, you housewives, you traders, you sailors, your labor is holy if you serve the Lord Christ in it, by living unto him as you ought to live. The sacred has absorbed the secular.
-Charles Haddon Spurgeon
HT: Desiring God