Reasons why the sculptor was working so hard:

Passion for Art:
The sculptor may have had a deep passion for art and sculpting. Creating art could be a form of self-expression and fulfillment for them, which could be a driving force behind their hard work.

Desire for Perfection:
The sculptor might have a strong desire for perfection in their work. They could be constantly striving to improve their skills, create intricate details, and achieve a high level of craftsmanship in their sculptures.

Commitment to their Craft:
The sculptor could be dedicated to their craft and take pride in their work. They might have a strong work ethic and be willing to put in long hours and hard work to create masterful pieces of art.

Professional Goals:
The sculptor may have professional goals they are working towards, such as gaining recognition in the art world, showcasing their work in prestigious galleries, or achieving commercial success. These goals could be motivating them to work tirelessly on their sculptures.

Inspiration and Creativity:
The sculptor may be inspired by various sources, such as nature, history, emotions, or personal experiences. Their creativity could be a driving force behind their hard work, as they continuously seek new ideas and innovative ways to express themselves through their art.
In conclusion, the sculptor's dedication, passion, desire for perfection, commitment to their craft, professional goals, and inspiration and creativity could be some of the reasons why they were working so hard on their sculptures. Their relentless efforts and hard work could be fueled by a combination of personal, artistic, and professional motivations.