Answer:
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
What covers its face with its hands, speaks no language, yet most known what it's saying?
I am a good state, there can be no doubt of itΝΎ But those who are in, entirely are out of it.
What is round as a dishpan, deep as a tub, and still the oceans couldn't fill it up?
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
What do angels sing in the shower?