Anne Bradstreet was the first female American writer who gained prominence after the first colonies were established in America. She actually gathered quite a following in England, but was quite embarrassed and sheepish about it. She wrote very honest poetry about what mattered to her, including her children and husband. Some critics dismiss her poetry as too simplistic, but these critics do not give her enough credit for her beautiful diction and heartfelt words.
To reveal the theme of this poem, you must look no further than her diction (word choice). Her words are heartfelt and honest and straightforward. She also uses quite a bit of hyperbole, which is exaggeration, to express her theme of love for her husband and how much she misses him.