This paper explores the interpretation of Parmenides' fragment A 46, in which Theophrastus attributes to the ancient philosopher the view that everything that exists possesses some form of knowledge. The text examines the relevance of this idea within the context of modern philosophical and scientific discourse. The author suggests that while one must set aside archaic mechanisms, such as the principle of perception by similarity, the core concept of universal reactivity or elementary knowledge remains thought-provoking today. The primary argument posits that at lower ontological levels, we cannot expect cognitive processes in the human sense or scale; however, we can assume specific forms of environmental response that form the foundation for more complex modes of consciousness. The study thus connects ancient ontology with questions regarding the nature of perception and the limits of knowledge in the lowest structures of the world. This approach allows us to view Parmenides' teachings not as a historical relic, but as a living stimulus for contemporary reflection on the relationship between being and consciousness.