The best and most convincing way to show your faith is not to tell the world about it but rather live it in dignity. Anyone can "claim" Christ. Anyone can "share" Christ. Few can live Christ.
I have a friend that told me that I have no business speaking against ministers, priests, preachers and the like as they are men of God and have studied to be so what with having degrees in Theology and the like.
I reminded him that the Pharisees said the same of Jesus. He was an unlearned son of a carpenter and therefor unqualified to speak on matters of God. Typical of men to seek the praise of men through books rather than the peace of God through doing.
The world at large knows of Jesus of Nazareth. The Gospel is well known everywhere and there is no need to "share" it with anyone. Just live it and if someone asks, then speak the faith you live and leave it at that. No need to offer more when it is not requested.
Again, the world is aware of Jesus of Nazareth. To quote Ghandi, "I like your Christ, I do not like your Christians. Your Christians are so unlike your Christ."
That is because so many name it and claim it but fail to live it.
Because of Reeves (who lost his faith a long time ago) I don't make fun of Atheists but I wont suffer them being jerks toward Jesus of Nazareth. You don't believe in Christ? Fine. Leave it at that and either be a friend or not.