Neither of those explanations sit well with me @
ArchAngel217 and @
Gorozoron. Who would create a magic, holy, relic; based around flaws? For starters, just seeing Ravio as nothing more than a coward is like seeing the locations in Termina as only the stages of grief. Yes, it obviously plays into the experience of the game, but can diminish the full appreciation, if that's all we look at. He may see himself as a coward, and others may even see him as such, though that does not truly define a person. Everyone has redeeming qualities. On top of that, If all Lorule is, is a negative reflection of Hyrule, then saving it is pointless. Caring about it's people and history are also pointless. It will just exist as a byproduct of the fabulous Hyrule. No, it seems far more likely that the Lorule triforce was also built, in it's own history, on ideals for people to strive for.
They were probably built by the same three goddesses, in fact. Unless, that is, we want to open up the theory about Demise being the Lorulian equivalent of Hylia, or even on par with the three. Either way, whoever did create the Lorule triforce would have based them on virtues that they deemed important, possibly even the most important. I see this happening in two ways. The way I saw it, as I played through the game, is that the nature between the two worlds is not opposites, but twisted. The town is still a town, just twisted. I found Ravio to be wise, Hilda to be strong, and Yuga to be brave. Unfortunately, for them, they were comparing themselves to their other-world counterparts. This means that Ravio saw himself as a coward, not realizing his wisdom.
The other way I can see it, now that I'm revisiting the issue, is that it's caution mistaken for cowardliness. Ambition, or hope, mistaken for naiveness. Perhaps it is slyness that is mistaken for weakness. Either way, the Lorulians are disconnected from their triforce, making it dificult for them to realize their own strengths.