Here's how I'd translate the passage:

...based on the manner's relationship to the entity. Indeed, if the manner of the referent's action is 'strong', one can legitimately infer that, apparently in all cases, the referent entity itself must also be 'strong'. The manner of the predicate is thus reinterpreted as a modality judgment about the appearance of the entity denoted by the subject.

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Note added at 1 hr (2012-03-19 18:08:20 GMT)
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Some examples of "referent entity" from scholarly works on semantics:

"Likewise, the degree of semantic overlap between the anaphor and the referent is likely to play an important role in the resolution of many noun anaphora that require the reactivation of the referent entity..." http://goo.gl/tffud

"Two further conceptual categories here are 'perspectival distance', with three main member notions: a perspective point's distal, medial, or proximal distance from a referent entity;..." http://goo.gl/hyj4k

"For, clearly the fact that a nominal is prefixing can be seen as an iconic reflection of the fact that the referent entity is so closely connected with its "possessor" that it can have no existence independent of the latter." http://goo.gl/3YXnE