Answer:
The speaker is able to solve problems with people he feels kindly toward.
"I was angry with my friend I told my wrath my wrath did end"
Step-by-step explanation:
William Blake's short poem "The Poison Tree" is a metaphorical description of what anger and hatred can do to a person if it is repressed. The speaker presents two cases where he dealt with the anger and how it ended in the two scenarios.
Part A- The speaker tells his friend about his "wrath" and the anger was resolved. On the other hand, he repressed the anger about his foe which grew. This shows that the speaker's treatment of his friend and his foe is different and their resolution of any "wrath" depends on their relationship. He was able to resolve the problems with his friend, someone he feels kindly toward while the same doesn't happen for his foe.
Part B- The answer of Part A is supported by the line "I was angry with my friend I told my wrath my wrath did end". Telling his friend about the anger helped resolve the issue between them and peace came. But on the other hand, "I was angry with my foe: I told it not, my wrath did grow" shows that the refusal to tell his foe about the anger only led to the growth of that hatred.