Neither will one be like or unlike itself or other.
Why not?
Because likeness is sameness of affections.
Yes.
And sameness has been shown to be a nature distinct from oneness?
That has been shown.
But if one had any other affection than that of being one, it would be affected in such a way as to be more than one; and that is impossible.
True.
Then one can never have the same affections either as another or as itself?
Clearly not.