There are studies that show that most people come to church and into a claiming of Jesus as savior because someone invited them. Typically this is a family member or friend. It doesn't matter a whole lot what the motivation behind the invitation is. It can range from loving someone so much that you want to spend an eternity with them and know that a saving relation with Jesus is essential, to simply being kind enough to invite someone who doesn't have friends in hope that might be remedied by being part of a church congregation. Whatever brings a person in, the object of that is to spend time with the teacher and become a disciple.
Disciples find themselves doing mission and ministry.
In doing mission and ministry they see and hear about lives being saved and changed in a Godward direction. They see and hear of signs and wonders. All Christians who are disciples, who spend time with Jesus doing mission and ministry, have stories of signs and wonders. For instance, a group at the Episcopal Church Center in New York meets daily to read the Gospel and ask and reflect upon specific questions in a time of prayer. The time gathered for Gospel reflection and prayer has come to give shape to the ministries of the people who participate.