To evangelize is to spread the good news that Jesus Christ died for our sins and was raised from the dead according to the Scriptures, and that as the reigning Lord he now offers the forgiveness of sins and the liberating gifts of the Spirit to all who repent and believe. Our Christian presence in the world is indispensable to evangelism, and so is that kind of dialogue whose purpose is to listen sensitively in order to understand. But evangelism itself is the proclamation of the historical, biblical Christ as Saviour and Lord, with a view to persuading people to come to him personally and so be reconciled to God. In issuing the gospel invitation we have no liberty to conceal the cost of discipleship. Jesus still calls all who would follow him to deny themselves, take up their cross, and identify themselves with his new community. The results of evangelism include obedience to Christ, incorporation into his Church and responsible service in the world. – Lausanne Covenant
The Bible’s overriding purpose throughout is to bear witness to Christ, to proclaim the goon news that He is Lifegiver and Lord and to share that story to people so that they may trust Him.
We find Jesus, as our Lord, demanding total allegiance. In fact, some first-century Jews saw the gospel as undermining Judaism.
“Fellow Israelites, help! This is the man who is teaching everyone everywhere against our people, our law, and this place; more than that, he has actually brought Greeks into the temple and has defiled this holy place.” – Acts 21:28
First-century Romans also feared for the stability of the state, since in their view the Christian missionaries were being disloyal to Caesar and advocating customs which were not lawful for Romans to practice.
And are advocating customs that are not lawful for us as Romans to adopt or observe. And Jason has entertained them as guests. They are all acting contrary to the decrees of the emperor, saying that there is another king named Jesus. – Acts 16:21;17:7
Still today Jesus challenges many of the cherished beliefs and customs of every culture and society.
The apostle Paul remains a great example of one whom Jesus first stripped of pride in his own cultural privileges and then taught to adapt to the cultures of others, making himself their slave.
For though I am free with respect to all, I have made myself a slave to all, so that I might win more of them. To the Jews I became as a Jew, in order to win Jews. To those under the law I became as one under the law (though I myself am not under the law) so that I might win those under the law. To those outside the law I became as one outside the law (though I am not free from God’s law but am under Christ’s law) so that I might win those outside the law. To the weak I became weak, so that I might win the weak. I have become all things to all people, that I might by all means save some. I do it all for the sake of the gospel, so that I may share in its blessings. – 1 Corinthians 9:19-23