algebra
"Talking algebra is like talking street slang. You may know the words being used, but you have to be familiar with the context to understand."
"Utilizing only a stepladder is like doing only arithmetic. You can accomplish a lot, like keeping a budget or balancing your checkbook. However, using algebra is like using an extension ladder because you can still do arithmetic if you like but can also do much more."
"Algebra is like a balance scale. To keep a balance scale balanced you will need to do the same to each side."
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.