Question

explain- i have something to expiate??

Answer 1

The poet feels very sorry for his disgraceful, unacceptable and uncouth behaviour and action and rebuked the voices of education and civilisation that had shaped his thoughts and urged him to have chased away the creature. Thus, he says that he has to make amends in his behaviour or change his attitude, deviating from pettiness. Hope it will help

Answer 2

The poet regrets his decision of striking at the snake .The snake had been harmless,dignified and was too thirsty. Trying to kill it was a mean act and the poet wishes to make amends for his violent approach .He wishes to give due honour to the snake ,that it deserves.This is why the poet exclaims that he has something to expiate.