Church growing needs Christ is with us and His words be preached.

Acts 19:1-12
Paul told 12 disciples that "John's baptism was a baptism of repentance. He told the people to believe in the one coming after him, that is, in Jesus." On hearing this, they were baptized into the name of the Lord Jesus. When Paul placed his hands on them, the Holy Spirit came on them.
Paul entered the synagogue and spoke boldly there for three months, arguing persuasively about the kingdom of God. But some of them became obstinate; they refuse to believe and publicly maligned the Way.
Paul left them with the disciples and had discussions daily in the lecture hall of Tyrannous. This went on for two years.
If Paul could win the people of Ephesus to the Christian faith the news would spread through the whole province of Asia.
These two years indicates that this is just what happened. It is likely that all seven churches mentioned in Revelation 1:11, as well as those at Colossae and Hierapolis, were founded during this period.
Why?
Believed in the name of the Lord Jesus, then it is baptised by the Holy Spirit.
When preaching gospel for a while, people became onstinate, and refuse to believe and publicly maligned the Way, leave them is the best way.
Two years lectures at Ephesus, Paul has strengthed many churches.
How?
Church growing needs Christ is with us and His words be preached. Paul is my good example.