"The key to understanding current is that it flows in loops. Power transmission is like a chain drive on bicycle. It's distracting to think of it "coming from" either of the terminals. Power is delivered by the current flow past a point."
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.