Sentence:  Again , Henley 's attitude of defiance which colors his ideal of self mastery is far from characteristic of a <WSD>Stoic</WSD> thinker like Marcus Aurelius , whose gentle acquiescence is almost Christian , comparable to the patience expressed in Milton 's sonnet on his own blindness . 
Meaning of the word marked with <WSD> tags:  a member of the ancient Greek school of philosophy founded by Zeno