Acts 18:3

So, because he was of the same trade, he stayed with them and worked; for by occupation they were tentmakers.

1. Dual occupation - Some preachers also work at another occupation and also work for a church. These men are often called "part time" preachers but they often are actually working longer hours than some "full time" preachers.

2. Paul can help Aquila in his business - and Paul can also teach them the gospel.

3. We know that he succeeded in converting them because later they return to Rome and are part of the active church there. (See Romans 16:3-4.)