Ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you.—Romans 8:9.
That life is carnal in which our spirit, meant for God, is dragged at the chariot-wheels of our lower life; and that is spiritual which is ruled and mastered by the Spirit. Secular business is spiritual if it is ruled by the divine Spirit according to the law of righteousness. Politics are spiritual, commercial and municipal life are spiritual, art and science, are spiritual, and everything that develops our faculties is spiritual, if we will allow the divine Spirit to rule in all according to the law of righteousness, truth, and beauty. For the whole of our being, with all its sum of faculties, is made by God and meant for God.
It is the very business of your life to cultivate every faculty you have (the highest most, and most in the highest directions), in the belief that He has given them to you that you may become His instruments for usefulness; and that He asks this of you, because, if you grant it, you enable Him to give you more of His own happiness than you can otherwise receive, and far more than you can imagine.