In writing If You Could See What I Hear, Sullivan set out to convey his philosophy of embracing life fully, regardless of the challenges one might face. He emerges as an inspiring figure for young adults, many of whom seek such encouragement in navigating their own paths. Sullivan embodies the struggles of those who encounter discrimination, having spent much of his life overcoming the societal labels frequently imposed on minority groups. He openly shares that his blindness necessitated a constant battle against these stereotypes, leading him at times to engage in daring acts simply to demonstrate his capabilities. This impulse to defy societal expectations and establish one's value resonates deeply with young adults.

Following the success of If You Could See What I Hear, Sullivan continued to explore autobiographical themes, crafting narratives that appeal to a younger audience. In 1976, he released Adventures in Darkness, a work specifically designed for young readers, offering them insights into his life and the challenges he faced. His collaboration with actress and animal-rights advocate Betty White in 1991 resulted in The Leading Lady, a touching narrative centered around his beloved guide dog Dinah, who had to retire due to old age. This book not only commemorates Dinah’s steadfast loyalty but also delves into her transition into a new life with White.

Sullivan's passion for storytelling and his engaging narrative style have garnered him significant recognition. A testament to his influence and popularity is the 1982 film adaptation of If You Could See What I Hear. Through his works, Sullivan not only entertains but also enlightens, offering a lens into the life of someone who has skillfully navigated the intersection of disability and societal expectation. His writings continue to serve as a beacon of encouragement for those striving to assert their worth and live without restraint.