We need to be among non-Christians in order to share Jesus with them. It is as though they think that because we are Christian we are perfect. Well, I hate to be the one to burst their bubble (well, ok I don't hate that because they need to know), but the church is filled with sinners! We are Christian, we are not perfect. We still sin and make mistakes. The only difference is that we have One who will forgive us and cleanse us. We have someone who has given His life so that we may have eternal life. Those non-believers need this opportunity as well. They need to know about Jesus, His love for them, His willingness to die for them and be raised to eternal life. God is not willing that any should perish! We have a mission, the Great Commission that Jesus called us to.
If we don't associate with the non-believer, then how on earth are we accomplishing the Great Commission, to go into the world making disciples and baptising in the name of the Father, the Son and the Holy Spirit? Just how would we reach them if we don't befriend them and associate with them? Do we just put up catchy signs outside the church, bumper stickers, wear t-shirts with a Christian message, or bracelets with the WWJD emblem and hope that would be enough to bring them to Him? Well, guess what...that won't cut it!
The way we live our lives speaks great volumes to those we live with and associate with. People should be able to see something 'different' about us. We should be living our lives to reflect Jesus to the non-believer. But if we don't associate with them, then how will they see this?
Now, mind you, there are some so called Christians out there talk the talk, but don't walk the walk. We can also be witnesses to them...reminders of what being a Christian is about. It is one thing to sit in church every Sunday singing, listening to the sermon, etc., but if we do not put into practice what we are taught then what's the point? Jesus was a man of action. He went out among the people and taught them, ate with them, befriended them. What do we do?
According to dictionary.com, one of the definitions of 'Christian' is this:
Manifesting the qualities or spirit of Jesus; Christlike
So, if we are to manifest (that is to be obvious or make clear) the qualities of Jesus we are to go among the non-believer, those who need Jesus in their lives. If we only fellowhip with each other (and fellowship with other Christians is important and the Bible tells us to do this), then how are we going to reach them?