“If my life is fruitless, it does not matter who praises me, and if my life is fruitful, it does not matter who criticizes me.”-John Bunyan, author of Pilgrim’s Progress (not to be confused with Paul Bunyan, the mythical lumberjack).
This is the attitude a saved person should have. We should not be worried about how our enacted faith will look to others. We should not act so that we may be praised by others. Nor should we paralyze ourselves spiritually so that we are not judged by the secular world. Our judgement is already set, we are guilty. Our sentence has already been executed, and someone undeserving of it took it for us.
So, we are left simply to act and to “be fruitful.” No thought should be given about how the world sees us.