The fifth light of Chanukah is a night celebrated for its inability to ever fall during the Shabbat, it's entrenchment within the days of the week. The Fifth night is always a light among the darkness. Where light always trumps dark, the peak of the darkness for the year that always has a crack of light within.
Sometimes you need to dig deep to find it, sometimes you need to forget about looking for it and just feel it, sometimes you need to act like it's already there and it will start to illuminate the way for you. But the light - it's there, whether you can see it or feel it or hear it.
And all you have to do, is use it to light up the rest of the world - the nooks and crannies and dark pieces within and without that might never be fully washed with bright light, but a tiny little candlelight makes it a little less black, a little more bright, and the next thing you know, every single person is a carrier of incredible, divine light.