1. We have been commanded to do so.
We have been commanded to preach the gospel to all creation. Jesus said, “Go into all the world and preach the gospel to every creature” (Mark 16:15). We need no other reason.
2. Hell exists.
Jesus said, “But I will show you whom you should fear: Fear Him who, after He has killed, has power to cast into hell; yes, I say to you, fear Him!” (Luke 12:5). If Hell didn’t exist, we would have a legitimate excuse for passivity. But we have God’s Word (and reason) to tell us what awaits guilty sinners. How coldhearted would we be to not warn of its reality!
3. We strive to love our neighbor as much as we love ourselves.
A firefighter rescuing people from a burning building may be fearful and prefer to be home with his family, but he ignores his fears and denies himself. Like him, our thoughts are not on ourselves but on the fate of the perishing. “And on some have compassion, making a distinction; but others save with fear, pulling them out of the fire, hating even the garment defiled by the flesh” (Jude 22,23).
“A firefighter rescuing people from a burning building may be fearful and prefer to be home with his family, but he ignores his fears and denies himself. Like him, our thoughts are not on ourselves but on the fate of the perishing.”
4. Obedience is evidence of salvation.
The Bible says that Jesus is the author of eternal salvation to those who obey Him (see Hebrews 5:9). We are not saved by our obedience; we are obedient because we are saved. Jesus said, “But why do you call Me ‘Lord, Lord,’ and not do the things which I say?” (Luke 6:46).
5. To remain in silence is a sin.
As soon as the Holy Spirit was given, the apostles began to preach the gospel. God had granted everlasting life to dying humanity! They could not stay in the Upper Room because God’s love provoked them to reach out to the lost. “To him who knows to do good and does not do it, to him it is sin” (James 4:17).
“As soon as the Holy Spirit was given, the apostles began to preach the gospel. God had granted everlasting life to dying humanity! They could not stay in the Upper Room because God’s love provoked them to reach out to the lost.”
6. Evangelism deepens our walk with God.
Nothing teaches a fisherman like fishing. Interacting with the lost results in greater confidence and faith in God. “…hearing of your love and faith which you have toward the Lord Jesus and toward all the saints, that the sharing of your faith may become effective by the acknowledgment of every good thing which is in you in Christ Jesus” (Philemon 5–6).
7. It causes us to search the Scriptures.
Wanting to know how to answer every man will send us to God’s Word. “Be diligent to present yourself approved to God, a worker who does not need to be ashamed, rightly dividing the word of truth” (2 Timothy 2:15).
8. It deepens our gratitude for the cross.
As we continually preach the cross, it will deepen our understanding of what God did for us in Christ. We will find ourselves practicing what we preach, so we will be frequently thinking about the cross. “I determined not to know anything among you except Jesus Christ and Him crucified” (1 Corinthians 2:2).
9. It deepens our prayer life.
“Our fears and sense of inadequacy will also drive us to our knees—the safest place for a Christian.”
We reveal our love for the lost by pondering their fate, and as a result we cannot help but cry out to God for them. “My heart’s desire and prayer to God for Israel is that they may be saved” (Romans 10:1).
Our fears and sense of inadequacy will also drive us to our knees—the safest place for a Christian. “Therefore I take pleasure in infirmities, in reproaches, in needs, in persecutions, in distresses, for Christ’s sake. For when I am weak, then I am strong” (2 Corinthians 12:10).
10. We have been commanded to imitate Paul.
Paul showed his love for God and for sinners by his obedience to the Great Commission. “I also please all men in all things, not seeking my own profit, but the profit of many, that they may be saved. Imitate me, just as I also imitate Christ” (1 Corinthians 10:33—11:1).