Hello, I would say preaching the word and helping others to learn about God and his promises within the Bible. In the modern world TV Evangelist were people that used the television to spread God's word around the world. Even though their world often came crashing down millions loved this form of preaching. This is a powerful way, and it is one of the modern Christian ways that was used among believers that wanted to follow Jesus Christ.
The example that Jesus Christ taught was to send his disciples out to proclaim the Good News about God’s Kingdom, Luke 10:1–12. This is still a strong Christian virtue and related to charity as in helping others. Jesus foretold that people would preach right down to the End of the World, Matthew 24:14. Another way is to establish a Christian church perhaps in a foreign country, this too is a powerful way to build the house of God, John 21:15–17. This is the ways that Jesus Christ supports the Christian faith.
