For example, the tiny ant, a creature of great industry, drags with its mouth whatever it can, and adds it to the heap which she is piling up, not unaware nor careless of the future.
The poets aim is either to profit or to please, or to blend in one the delightful and the useful. Whatever the lesson you would convey, be brief, that your hearers may catch quickly what is said and faithfully retain it. Every superfluous word is spilled from the too-full memory.