An excerpt from The Book Of Bobby Maximus (Verse 7, Chapter 23):

There is no greater fraud than a promise not kept. 

Don’t make a promise you can’t keep and don’t say something unless you mean it.  

Promises are worse than lies because they give people hope for something you’re not sure you can give. 

A promise means everything but once it’s broken sorry means nothing. So remember that a clear rejection is always better than a promise. 

Choose your words carefully, don’t let your mouth write checks that you’re not able to cash, and above all else be sincere with your intentions. 

Don’t tell people you have their back when you don’t. 

Don’t tell people you’ll be there for them when you won’t. 

In the end you are what you do, not what you say you’ll do…