Final answer:
The author of 'Heartbeat' explores themes of love, courage, and belief in the text, depicting how personal emotions can manifest in actions based on deeply held convictions and how individuals understand these intense experiences.
Step-by-step explanation:
In Heartbeat, the passages provided present an exploration of personal emotions and beliefs, particularly in the context of love, courage, and social change. The excerpts reflect on characters' internal experiences and the intensity of their emotions, as well as the actions that stem from deeply held beliefs and convictions. From the given excerpts, we deduce that the author discusses themes of love, heroism, beliefs, and the human capacity to understand and embody these experiences profoundly. For instance, the text mentions a character experiencing a surge of love and the palpability of the emotion, as well as reflecting on heroes and their large hearts and courage. Additionally, the subject of belief is woven through the narrative, suggesting that repetition and conviction can engender belief in others, and conversely, that individuals often feel compelled to act on their beliefs.