I don't know about Plato, but I'm sure that Hegel and Plotinus would go along with the ideas here. 

Hegel showed why the supramundane (and thus the world as a whole) can be spoken of only in contradictions. By reduction all distinctions would be unreal. The universe would be a unity and all positive metaphysical positions would be false. Any statement for which the universe is this or that in any instance will embody such a position and will therefore be unrigorous and inadequate. This forces the mystic, who must always speak from a neutral metaphysical position, to speak, when speaking rigorously, in contradictions,  

Plotinus seems to hold the same view, likening this unity to a hypersphere for which, I think it would be roughly correct to say, the surface is the mundane realm and the centre is the supramundane,with every point on the surface directly connected to the centre, or even identical with the centre. Or something like that in a more theistic language. 

The Wordsworth discussion surprises me. I'm not a student of his poetry but I've always taken it for granted that Tintern Abbey (or at least the section quoted here) is about God. I can't see what else he could have been talking about. Is another view possible?