Here's a distinction worth remembering...
With the exception of private prayer, God builds His kingdom publicly whereas the kingdom of darkness is advanced in secret.
Think about it...
On the one hand you have preaching, baptisms, worship, serving, witnessing -- events all done in the open.
On the other hand you have deception, manipulation and hidden agendas. Deeds done in darkness.
The reason this difference is worth keeping in mind is this:
If you feel intimidated to keep your light hidden, you can know you're being pushed in the wrong direction.
God wants your light to shine.
"Let your light shine before men in such a way that they may see your good works, and glorify your Father who is in heaven" (Mt.5:16).