I think he does as well; I think it's the 'attachment' part he's struggling with.

[ Luke let out a breath, hating to admit this, but... ]

I don't know your grandfather very well, Anakin. I'll admit... I'm used to him being 'Vader', and when I first arrived here... well, I treated him as such, deciding to be truthfully blunt to him about what the future had in store for him, only to have it backfire miserably.

But I do know where he came from, and... well, I'm starting to think that perhaps he views 'attachment' the same as owning something, or someone.