Sentence:  [...] but in the verity of extolment / I take him to be a soul of great article and his <WSD>infusion</WSD> / 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:  The act of installing a quality into a person.