Quote Originally Posted by G SpOtZ
another interpretation is that griever is the messenger. but i can only back that up with relating these:
sleeps=griever is within squalls mind, as well as the rest of the party's minds, so in a way it is dormant until they fight ultimecia and she summons griever.
garden= there's two ways to approach this. griever is within squall, and squall is a SeeD for balamb garden, so griever is in balamb garden... or you can relate this to future esthars theory about ulti's castle being a version of a Garden like Balamb's and Galbaldias, so griever waits to be awaken in ulti's castle/garden.
So....what about the messenger part? The messenger part doesn't really relate...

Maybe you can relate the Griever as the messenger of strength as it is told in Squall's mind as the stronger GF.