By applying the same concept to different things the child lays the groundwork for visual categories of a higher order, capable of indicating similarities among objects that have something in common although they differ otherwise. The great network of relations begins to form.
— Rudolf Arnheim, Visual Thinking (Kepes 1965)
Over a long period of time, in the same way that the water of the stream slowly shapes the bed, neural activity changes the connectome. The two notions of the self—as both the fast-moving, ever-changing stream and the more stable but slowly transforming streambed—are thus inextricably linked.
— Sebastian Seung, Connectome: How the Brain's Wiring Makes Us Who We Are (2012)