|image sourced from: flickr.com|
The original quote is actually: “Go at it boldly, and you'll find unexpected forces closing round you and coming to your aid” however, it is sometimes cited as "Be bold and mighty forces will come to your aid."
This was quote was by a Canadian author and pastor Basil King, when he was speaking about overcoming fear. This quote speaks about courage.
I think it means that if you are willing to be daring and courageous in your acts then you will always find help. Someone will always be willing to assist those who are brave enough to ask for help.