"A promise must never be broken." 

-Alexander Hamilton 

If you say you're going to do something, do it. Don't ever break promises. Promises build up your reputation but they can also destroy it. I personally don't like breaking promises and i don't like people breaking their promises. I feel disappointed when others break their promises , why say you're going to do something if you're not? Breaking promises can have repercussions. For example, you can lose friends, family, your reputation and ect. If you know youre not good at keeping promises, don't make them.