Of course, the finest work a Christian can do is that of helping others to learn about God and serve Him. If you are a witness of Jehovah, are you really zealous in doing this ‘fine work’? First-century Christians displayed zeal for evangelizing, even in the face of persecution.​—Acts 11:19-21.

16. (a) What is a basic reason for the existence of the Christian congregation? (b) What has been said about the evangelizing work of Jehovah’s Witnesses?

¹⁶ Despite the persecution of Jehovah’s Witnesses today, God’s spirit moves them to carry out the Kingdom-preaching commission​—a basic reason for the existence of the Christian congregation. (Matthew 24:14; 28:19, 20; Isaiah 61:1, 2) Like the early Christians, they zealously do the fine work of proclaiming the “good news” from house to house and otherwise. (Acts 5:41, 42; 20:20, 21) In his book Evangelism, Inc., G. W. Target discusses witnessing methods including “doorstep evangelism” and notes that “some people would even call it the most common method​—especially after the latest visitation from the Jehovah’s Witnesses. . . . Others are catching on fast, but the Jehovah’s Witnesses lead the field.” Concerning the use of Bible literature, Target admits: “Once again, the Jehovah’s Witnesses [are] leading the field. . . . By comparison, . . . very few denominations actually publish evangelizing matter.” Indeed, Christian literature produced with the help of God’s holy spirit and available from Jehovah’s Witnesses for a contribution is helping sheeplike ones earth wide to learn and do the divine will.

17. How can it be proved that God has prospered the preaching work of Jehovah’s Witnesses?

¹⁷ Jehovah prospered the preaching work of the early Christians. Thus congregations were formed in one place after another​—Rome, Corinth, Ephesus, Philippi, Colossae, Thessalonica and elsewhere. Similarly, Jehovah is prospering the preaching activity of his modern-day servants, so much so that over 46,000 congregations of Jehovah’s Witnesses now exist worldwide. To God goes the credit for such marvelous growth.​—Isaiah 60:22; 1 Corinthians 3:6, 7.

¹⁹ As zealous Kingdom proclaimers, we are serving the Universal Sovereign​—the finest privilege any human can have. Ours is “the holy work of the good news.” Why, no other earthly endeavor brings greater joy than does declaring the message of “the happy God” and helping others to learn about him!​—Romans 15:16; 1 Timothy 1:11.