Personal invitation is much more effective than public invitation. Billy Graham openly said that the success of his massive public meetings was down to massive personal evangelism by lots of other people who, basically, said, ‘come and see’. In John’s Gospel (chapter 1:43-47), Jesus found Philip and said to him, “Follow me.”
Philip in turn found Nathanael and told him, “We have found the one Moses wrote about in the Law, and about whom the prophets also wrote – Jesus of Nazareth, the son of Joseph.”
“Nazareth! Can any good come from there?” Nathanael asked.
“Come and see,” said Philip [and he did].
When Jesus saw Nathanael approaching, he said of him, “Here is a true Israelite, in whom there is nothing false.” – Jesus knew him already! – If every one of us was a Philip, and we each invited just one other person to ‘come and see’ we might very possibly have to start a new church. Evangelism is a body ministry.