Yeah, Obito is the "negative" naruto. What could have happened if he wasn't steered in the right direction. For Obito, it was the pain of losing someone you love. Rin was his "light" if you will, and after losing himself he didn't that that person who could be his voice of reason/stability. I thought it was symbolic when he was crushed under the rock holding Rin's hand, and then he told her to hurry and escape when meant he let go of his "light", his "hope". For naruto last chapter proved the prophecy of the old toad sage, he had a decision and obito almost talk no jutsu'd him which makes him exactly like naruto, they both can be somewhat convincing & inspiring. Naruto was waken up by hinata, who's name means "sunny place", so she's his light, and instead of forgetting the hand, he grabbed the "light" & the "hope" which was hinata's hand.
Basically, Kishi is saying we can do either of two things. Submit and be weighed down by the world, or we can grab a hold of the light, the hope no matter how small it might be. Things in the world are bad, but the thing is, that things can be better, and it's a good start. It begins with us. Lol sorry for the long analysis, just my thoughts.