But we (ourselves) cannot help telling...(Acts 4:40 AMP)
Where has God brought you from, and what has He taught you along the way to get you where you are today? Hold on to that, lean on that. Then shout from the rooftops how good God has been! Tell somebody, tell everybody!
Like Peter & John, when people see your boldness, they'll marvel and realize that the only explanation is that you've been with Jesus.
This is one of my favorite worship song - "Rooftops" - click here