The phrase "you are what you eat" suggests that the food one consumes reflects one's character, health, and overall well-being. It implies that the choices we make regarding our diet can significantly influence our identity, both physically and psychologically. In this context, the phrase can be interpreted as a metaphor for how our inner qualities and external behaviors are shaped by what we nourish ourselves with—whether that be food, values, or ideas.
In the lines provided, the poet emphasizes that while manners and clothing may create a good outward impression, the essence of who we are is determined by what we choose to 'consume.' This figurative language serves to reinforce the idea that superficial qualities, such as outward appearances and social behaviors, are less important than the foundational elements of our lives—our choices and the substance of what we engage with.
By contrasting these two perspectives, the poet advocates for a deeper understanding of identity. The emphasis on dietary choices hints at the significance of nurturing ourselves with positive, enriching influences instead of focusing solely on superficial traits. Thus, the use of this figurative language highlights the poet’s point of view that true worth and character come from the essence of what we eat and, by extension, what we engage with in our lives. It encourages readers to reflect on how their choices ultimately shape who they are.