At its core, metaphors perform a simple yet profound function: they bridge the unfamiliar with the familiar. How do metaphors and analogies work, and what makes a good metaphor? How can design leverage it?

Metaphors bridge the unfamiliar with the familiar by connecting abstract concepts to human-scale experiences. The evolution of brain metaphors reflects each era's dominant technology, from hydraulic systems to computer networks. In computing, the paper metaphor revolutionized interfaces by making complex machines accessible through familiar office concepts like desktops, folders, and trash cans. Smartphones later adopted physics-based interactions like pinch-to-zoom. Cultural differences in metaphors, such as how different languages conceptualize time spatially, reveal that assumed universal metaphors are often culturally specific. Good metaphors don't just explain ideas but transform how minds engage with concepts, opening new ways of thinking rather than simply mapping complex unknowns to complex knowns.

DOC • The secret of good metaphors