I would say the poem's mood is positive. He says he has tried several times to kill himself but no matter what he does he decides to make an excuse and not go with it. Stating no matter how bad things get he will go on living, because that's why he was born. That's why everyone was born, to live.
I would say the poem is positive because the person in the story, "Life is Fine" says that they wanna commit suicide and they just can't find a way of making an excuse of why so he/she continues living his/her life because he was brought in the world the same reason everyone else did; To live and make a difference in the world no matter how many mistakes you make whether you like it or not!
He leaves the astronomer's class to go look at the stars himself, which he found to be a better experience then just listening to someone talk about them.
