Given a text, write a compressed version of it in a single sentence.

True, the Gettysburg Address was not legally binding, but preambles are never meant to have the status of positive law. They are designed to explain why it is necessary for the government to bind itself to certain objectives.
The Gettysburg Address wasn't legally binding, but preambles aren't meant to have positive law status, but rather to explain why its necessary government to bind itself.