The following is an excerpt from The Maintenance of Good Works, a sermon preached by Charles H. Spurgeon on September 2, 1888. You can read the full text of the sermon here.
Be careful to maintain good works,” whether you are a babe in grace or a strong man in Christ Jesus. A holy household is as a pillar to the church of God. Children brought up in the fear of God are as corner-stones polished after the similitude of a palace. You, husbands and wives, who live together in holy love, and see your children serving God, you adorn the doctrine of God our Saviour! Tradesmen who are esteemed for integrity, merchants who keep an agreement even to their own loss, dealers who can be trusted in the market with uncounted gold, your acts are good and profitable both to the church and to the world! Men are won to Christ when they see Christianity embodied in the good and the true. But when religion is a thin veneer or a mere touch of tinsel, they call it “humbug”; and rough as the word is, it is worthy of the contemptible thing which it describes. If our religion comes from the very soul, if our life is the life of Christ in us, and we prove that we have new hearts and right spirits by acting the honourable, the kindly, the truly Christian part, these things are good and profitable for those who watch us, for they may induce them to seek for better things.
Yes, because Christ, having redeemed us by his blood, also renews us by his Spirit; so that our lives may show love and gratitude to God; so that we may be assured of our faith by the fruits; and so that by our godly behavior others may be won to Christ.