b) We are the representatives of Christ on earth
2 Cor. 5:20 20 Therefore, we are ambassadors for Christ, as though God were pleading through us; We implore you on Christ's behalf: Be reconciled to God.
As ambassadors of Christ we must represent the kingdom of God with dignity.
How?
We must care for our witness to take care of the testimony of Christ. Testimony is what others say about me, not what I say. Here one can not say "I do not care what people say, it's my life", that is not correct thinking, we are called to be light in the darkness. When a believer behaves incorrectly people not only criticized him in particular, but also directly or indirectly speaks ill of God for our sakes (2 Samuel 12: 11-5)
Speaking of this to take care of the testimony of Christ in social networks, some days ago I was on a bench and listen when someone spoke with the manager of the agency commenting on the photographs that a bank employee had boarded the internet and bad image that this person was giving the institution. Apparently they were going to ask to be more discreet in content and showing respect for customers remove some photos of their profile. On hearing this, I wondered, besides the gossip that they were telling the manager, you are people worry about the bank's image to customers, and we as Christians we care about the image of Christ when we publish comments or climb pictures the internet?