Sentence:  [...] but in the <WSD>verity</WSD> of extolment / I take him to be a soul of great article and his infusion / of such dearth and rareness as, to make true diction of / him, his semblable in his mirror, and who else would / trace him, his umbrage, nothing more. 
Meaning of the word marked with <WSD> tags:  Truth, fact or reality, especially an enduring religious or ethical truth.