Read the first two stanzas from "A Poison Tree" by William Blake.
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 waterd it in fears,
Night & morning with my tears:
And I sunned it with smiles,
And with soft deceitful wiles.
Based on these lines, how does Blake's use of metaphor demonstrate how anger can "grow"?