“A promise must never be broken.”

                               -Alexander Hamilton

What this quote means is that to never lie because lying is bad. If you say you promise to something and don't keep that promise you're lying and others will be affected by this . So if you say you're gonna do something do it because lying is bad. For example you tell your kid that you promise to make it to their birthday party and you show up when it ended. Now you're kid is now sad and disappointed. Now the next year comes up and you promise to make it to their party this time. She is not going to believe you because you've broke that promise before already.