Wordsworth footnote:

I almost did not write the last post, because the first time I read those lines from Wordsworth’s Prelude, I misread them.

At first, I thought he was making the trivial point that he had seen things differently when he was younger. But rereading, I realized that he was not making that trivial point.

Rather, he is saying that, now, as an adult, he is subjectively aware of two distinct, conscious Beings within him, one of which originated in, and relates to, his childhood; in other words, a child-aged alternate personality (the most common kind of alternate personality, because multiple personality starts in childhood).

Multiple consciousness—each with its own sense of “I”—is the essence of multiple personality. And that is what Wordsworth is describing.