This text explores the concepts of individuality and identity, focusing on the distinction between inanimate matter and living organisms. Starting from the etymology of the word individuum, the author critiques the notion that quantum particles possess mere identicality rather than unique identity. A central theme is the comparison between a heap and a living organism. While a heap is a collection of components lacking integrity or a central self, a living being possesses an inner core or subject that provides internal unity. This subjectivity allows an organism to maintain its unique identity even when some parts are replaced, whereas a heap lacks any self or subjective center. The author argues that true identity is inextricably linked to the presence of a subject and internal integrity, qualities absent in simple material groupings. The reflection concludes that while external identity may be superficial, the internal identity of a living being constitutes its essence and fundamental uniqueness, defining it as an indivisible whole.