A <em>simple subject</em> is the main word or words in a <em>subject.</em> It does not include any of the modifiers that might describe the subject or conjunctions that connect multiple simple subjects.
Some sentences contain <u>multiple</u> simple subjects. So “owl” is a simple subject in this sentence, and “elephant” is also a simple subject in it.
He might mean in a very passionate way but with some rage.
Or:
In the second stanza he talks about rage and passion, I think that he maybe tried to say that he hates someone or something rages him with a passion, that he like that this thing rages him.
