The frozen river of very heavy ice flows down hill and slowly grinds on the rocks below. Think of using sand paper on a piece of wood, the sand particles are very hard and when force is applied on the paper and on to the wood, the wood is eroded and smoothed.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.