Awareness of its own identity and awareness of the environment around it as separate from itself are central to the acquisition of knowledge by any organism. The sensory and interpreting apparatuses of any given organism are the means by which knowledge is acquired, and these means vary widely. For this reason, different species, different humans, and different disciplines comprehend themselves and the world around them differently. As humans, we have learnt to augment our senses in spectacular ways by our technologies, our concept-forming abilities, our linguistics, and our abilities to transfer knowledge from generation to generation. Nevertheless, there are upper limits to what we can comprehend even as humans. And those limits are set primarily by our genes and secondarily by our senses, our brains, and our vocal cords.