The primary theme from the poem, Forgetfulness, is literally that it is about the nature of forgetting things. The author is likely describing the regression of memory over time as we ALL age. It is the understanding that as we age, our ability to memorize and remember certain things fades and yet there are other memories we never forget.
One of the possible themes of the poem "Forgetfulness" by Billy Collins is that of the importance of identity. In this poem, the author talks about the complications and difficulties of memory loss. One of the most important consequences of this is the loss of self. The author talks about the impact of forgetting on a person. He compares a person's life with a book, and he talks about the person forgetting the title and the author of this book. This highlights the great impact that the loss of memories might have on a person.
