Explanation: : After reading the poem, the word barter now indicates that some sacrifice must be given in exchange for the “breath of ecstasy.” Theme: Subjects: loveliness, life, joys, giving. The theme of the poem is the loveliness of life is worth the cost of giving. Sara Teasdale poem hints to its true meaning. The word "barter" means to trade one thing for another. Teasdale's poem illustrates the belief that the good things in life do not come for free; they must be purchased or bartered by giving up other aspects of a person's nature.