This song is about how people want to believe in each other and how they are all connected in this gamble of a life but can't seem to find that connection.
It's always night or else we wouldn't need the light.
You can keep looking for those emotions forever because it's all true. We are all connected and everyone else actually wants to find the same things you're looking for, even if they don't know it.
Just don't stop believing it.
People will let you down, but don't stop believing in them.