The principles of multiplication and addition apply to world evangelism as well. There are two basic approaches of leading people to Christ. In one approach, all our energy is spent on evangelism and none on discipleship for the new believers. The other approach combines evangelism and discipleship. After a person has been led to the Lord, he is discipled to maturity and trained to lead others to Christ.
Addition happens in churches that preach the gospel message and weekly have new converts.
Yet, once the people are saved, there is little or no spiritual follow-up. This often results in stagnation in the life of the new believer. Although the new believer is saved, he never learns to reproduce himself by leading others to Christ. As a result, not only is the church leading people to Christ, the converts are also leading people to Christ. Each convert learns to multiply himself.