An epigram is a short form of verse that often is satirical, "On My First Son" by Ben Jonson the story been told is about the loss of a son, yet he finds a way out of his pain suggesting he should love less so he doesn’t suffer much. This characteristic of an epigram is known as wittiness, that is a clever way of thinking or finding solutions for problems. Wittiness can also appear in the form or how the verse is written.
Frederick Lucas said that the preamble did its job in setting the tone of the document and makes it clear why the Founding Fathers wrote it. Hope this helps.
