Communication: the poet/speaker communicates a direct moral lesson to the reader about the disastrous consequences of his own failure to communicate with another person. 'I told my wrath', 'I told it ...

I was angry with my friend: I told my wrath, my wrath did end. I was angry with my foe: I told it not, my wrath did grow. And I water’d it in fears, Night and morning with my tears; And I sunned it ...