Sentence:  Again , Henley 's attitude of defiance which colors his ideal of self mastery is far from characteristic of a Stoic thinker like Marcus Aurelius , whose gentle acquiescence is almost Christian , comparable to the patience expressed in Milton 's <WSD>sonnet</WSD> on his own blindness . 
Meaning of the word marked with <WSD> tags:  a verse form consisting of 14 lines with a fixed rhyme scheme