In literature, the term “depth” has been employed with remarkable versatility, shifting between literal and metaphorical meanings. In nautical adventures, for instance, authors like Jules Verne use it to denote profound, measurable expanses of the ocean—ranging from exact fathom measurements to seemingly boundless abysses ([1], [2], [3])—which heightens the sense of exploration and danger. At the same time, thinkers such as Montaigne and Coleridge harness “depth” to evoke the intricate inner workings of the mind or the layers of human emotion, suggesting that personal insight or knowledge often resides in unfathomable recesses ([4], [5]). Beyond these realms, “depth” appears in technical contexts—appearing in descriptions of physical measurements, whether in geological, architectural, or scientific observations ([6], [7])—illustrating how the word bridges tangible dimensions with the abstract qualities of sincerity, passion, and intellectual rigor.