I presume that you’re referring to the Skull of Dire Ahamkara. (Please cite your sources, our search functionality is easy to use )
This particular Lore Entry is a little different to a lot of the Ahamkara related items. The bones have always seemed to speak to their owners, referring to them as “bearers”, but this one acknowledges that and takes a different approach, appearing to talk directly to the player.
All I know is that YOU are not an illusion. Understand? This world around you, the people you meet—they’re a little thin, right? Cardboard and drywall. Cheap theater.
This could be a reference to the fact that the foes that we face, and most of the allies that we make, are characters in a video game.
I came to find you, only you, because you’re special. You’re from somewhere real. And together we can burn our way back there. Can’t we, o player mine?
And this could be a reference to the real world, as opposed to the world of Destiny. We are from “somewhere real” and we are “players”.
Of course, there could be a bunch of other interpretations as well. So whether it’s breaking the fourth wall or not is hard to say right now