Wonderful quote, if you can ignore the "loose". I see people use loose in place of lose all over the place and it drives me crazy! Loose and lose don't even have remotely similar definitions! Get it right people!End of rant.
An arrow can only be shot by pulling it backward. So when life is dragging you back with difficulties, it means that it's going to launch you into something great. So just focus, and keep aiming. My arrow tattoo next!