The song "I Know You By Heart" by JJ Heller is a heartfelt tribute to those who may feel overlooked, forgotten, or invisible in their daily lives. The lyrics describe a person who is constantly taking care of others, such as packing lunches, taking care of kids, and going through the routines of life, yet they feel as if no one truly sees or appreciates them. The singer acknowledges the struggles and emotions of this individual, empathizing with their feelings of being like a ghost that goes unnoticed. The singer wishes that this person could hear the truth that is clear to them - that they are enough and their presence and contributions in the world truly matter. The song also highlights specific situations where this person's emotions are hidden behind a smile, such as walking through the lunchroom or contemplating running away. The singer questions if anyone would notice if this person were to disappear, emphasizing the feelings of being forgotten and overlooked. Despite these feelings, the singer reassures this person that they are seen and known. The singer expresses pride in who they are and assures them that they are valued. The message is one of love, understanding, and acknowledgement for someone who may feel underappreciated or invisible in their daily life. Overall, "I Know You By Heart" is a comforting and affirming song that seeks to uplift and validate someone who may be feeling unseen and unimportant.