"Analogy (Greek ἀναλογία "proportion, correspondence, proportionality") - similarity, equality of relations; similarity of objects, phenomena, processes, quantities, etc. in any properties, as well as knowledge by comparison. (Wikipedia) Cognition is the key word in this story. To cognize proportionality, to explore, to compare, to find correspondences--this is what we do all our lives, and resemblance often pleases us. To be similar but remain individual is the truth!