Final answer:
The theme of "The Soul selects her own Society" centers on the concept of selective intimacy, where an individual carefully chooses companions and maintains a closely-guarded inner circle.
Step-by-step explanation:
The theme of "The Soul selects her own Society" can be deciphered by examining the refrain and the context in which society and personal relationships are portrayed within the poem. Rather than being about the refusal to make new friends or blaming oneself for loneliness, the poem tackles the idea of selective intimacy -- that is how individuals choose their companions and maintain a closely-guarded inner circle. The theme suggests that people reveal their feelings to only a few trusted friends or that one's soul determines its society with an exclusive and discerning approach.