“subtle yet powerful role of analogy in persuasion. Because while they often operate unnoticed, analogies aren’t accidents, they’re arguments—arguments that, like icebergs, conceal most of their mass and power beneath the surface. In many arguments, whoever has the best analogy wins.”― John Pollack

This is both a description of the power of analogy and an iceberg analogy applied. The iceberg can be used as an analogy in many scenarios where a mass is hidden beneath the surface.