…he who turns a sinner from the error of his way will save his soul from death and will cover a multitude of sins. James 5:20

How many have been converted by the example of true Christians. Many of you feel that you cannot write or preach, and you think you can do nothing. Well, there is one thing you can do for your Master; you can live Christianity. I think there are more people who look at the new life in Christ written out in you, than they will in the old life that is written in the Scriptures. An infidel will use arguments to disprove the Bible, if you set it before him; but, if you do to others as you would that they should do to you, if you give of your bread to the poor and disperse to the needy, living like Jesus, speaking words of kindness and love, and living honestly and uprightly in the world, he will say, “Well, I thought the Bible was all hypocrisy; but I cannot think so now, because there is Mr. So-and-so, see how he lives. I could believe my infidelity if it were not for him. The Bible certainly has an effect upon his life, and therefore I must believe it.”

…Oh! men and women, how can ye better spend your time and wealth than in the cause of the Redeemer? What holier enterprise can ye engage in than this sacred one of saving souls from death, and hiding a multitude of sins? This is a wealth that ye can take with you; the wealth that has been acquired under God, by having saved souls from death, and covered a multitude of sins. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0045.cfm