(Taunting Varric)Corypheus: "A beardless stone-worshipper? Run as fast as your little legs can take you!"
Varric: "So you're reduced to dwarf jokes now?"
I laughed
ridiculously hard.

Varric, my sweet prince, never change...
The Stone has a will that surrounds and directs; she guides even when we are willfully blind to her influence. But she is not pure. The Stone bears a corruption as old as balance. For the dwarves to prosper, the gangue--the waste and unstable rock-- must be cut away. But like the Stone, the gangue also has an influence. Each of us must face this, must carve the worst of ourselves away, but theLegion of the Dead bears a unique responsibility. Only the fully adorned of the Legion can face the gangue, can cut into darkness that afflicts the raw Stone. She encircles us, and we must protect her, here where darkness meets light.
--A Legion of the Dead inscription, undated
The "Dwarves forgot the dwarves" is correct. Seems like Ancient Dwarves had a sacred duty to The Stone that they eventually forgot.
Yummm, delicious dwarf lore.

If lyrium's alive and dead dwarven souls
literally return to the Stone and watch over their descendants... hrrnnm. I wonder why only the Legion can get rid of the rot?
Also, totally unrelated but
here's a really cool post about (Tolkien) dwarves having different standards of beauty. Figure it works just as well for DA. I'm obsessed with stuff like that - cultural and racial differences between all these fun fictional people...