Only let your conduct be worthy of the gospel of Christ, so that whether I come and see you or am absent, I may hear of your affairs, that you stand fast in one spirit, with one mind striving together for the faith of the gospel. – Philippians 1:27

If we would see the gospel spread abroad, we must have much holy living to back it all up. After we have done the sermon, people say, “How about the people that attend there? What about the church members, are they upright? Are they such people as you can trust? What about their homes? Do they make good husbands? Are they good servants? Are they kind masters?” People will be sure to enquire this, and if the report of our character be bad, it is all over with our testimony.

If you put the sword into the scabbard, you cannot kill with it; you must pull it out, and let it glitter in all its naked sharpness. If you put the sword of the gospel into the scabbard of worldly conformity, as some of you do, you cannot expect that there will be any power in it. Draw it away from your worldly company, and your pernicious customs, and then shall you see that it still has power to kill and to make alive. There must be holy living as well as plain testimony.

I say, my brethren, if we are to have the victory you must be every one of you in the fight. We must not spare a single one, neither man nor woman, old nor young, rich nor poor, but you must each fight for the Lord Jesus according to your ability; that His kingdom may come, and that His will may be done upon earth even as it is in heaven. We shall see great things when you all agree to this and put it in practice. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0802.cfm