It might be about the power of kindness. Through acts of service, characters show kindness, which could be a major theme. This kindness can have a ripple effect on other characters and the overall plot. For example, a character's small act of service might inspire others to be better or change their views.
Another possible theme could be redemption. Characters may perform acts of service as a way to make up for past mistakes. They try to find a new purpose in life by helping others. This could involve a character who has done wrong in the past and through acts of service, they are on a journey towards redemption, both in their own eyes and in the eyes of those around them.
I'm not sure as I haven't read the novel. But typically, a novel will have characters who initiate the acts of service and those who are the recipients. Maybe there's a protagonist who is on a journey of self - growth through service.
The main theme could be about the extreme actions or decisions that characters make when they are in desperate situations. It might explore how people react when they feel they have no other options left, perhaps in relation to love, career, or survival.
The central theme might be about secrecy and betrayal. Since it's about secret stealers, it could explore how secrets are important to people and what happens when they are stolen.
The central theme could be about moral judgment. Since the weighing of the heart is an ancient concept related to determining a person's worthiness in the afterlife in some cultures, perhaps in the novel it's used to explore the characters' moral standings.
I think the central theme of 'heroes of heart novel' could be the connection between the heart and heroism. It may show that true heroism doesn't come from physical strength alone but from the strength of one's heart. The novel could be exploring how characters with pure hearts, full of love, kindness, and courage, are able to achieve great things and become heroes. It might also be about how the heart can be a source of inspiration and power for those who are willing to listen to it and act upon its impulses.
The central theme could be about human relationships. In many novels, relationships are key, and this one might be no different. It could explore how characters interact with each other, whether it's love, friendship, or family bonds.
Well, the central theme might revolve around the idea that justice is not always straightforward. In this novel, it could be that justice is hidden in the dark corners of society, and the story is about the characters' journey to bring it to light. They might face many obstacles and moral dilemmas along the way.
The central theme could be the exploration of the qualities that make a hero. Given the title 'heroes of hearts novel', it could be about how the heroes draw strength from their inner selves, their hearts. It might show that true heroism comes not just from physical strength but from the courage and goodness in one's heart.
Think about what interests you the most or what you have a deep understanding of. That could be a great starting point for a central theme.
The central theme could be mystery. Since it's a 'secret thing', there might be a lot of elements that are not immediately clear, and the story could revolve around uncovering that mystery.