A heart can "break" in a metaphorical sense to represent intense emotional pain or stress caused by deep loss, often related to love or close relationships. This emotional heartbreak can feel unbearable and overwhelming, as it triggers grief, depression, anxiety, and even physical symptoms. Psychologically, heartbreak involves losing a part of one's identity or self- images associated with a loved one, causing shock and emotional instability. The phrase "how much can a heart break" reflects the depth of this pain, with some perspectives suggesting people can endure considerable emotional pain but it may wear them down little by little. The intensity of heartbreak is comparable to grief or mourning, as it involves profound loss and the challenge of adjustment. Research shows that brain areas responsible for physical pain are also involved in processing emotional heartbreak, underscoring how real and acute this pain can feel. Song lyrics like Pegasus' "How Much Can a Heart Break" poetically express the endurance, sorrow, and search for healing associated with heartbreak.