Two related monster messengers here, disappointment and guilt. The first tells you that need to change your expectations about another person or situation. You will know you are disappointed when you get that feeling that you are missing out on something and will never have it. See how it is the cousin of FEAR (not going to get what you want).
The second messenger tells you that you have disappointed yourself (regret) by breaking one of the rules you have for yourself, a violation of self. You feel bad. This feeling can only be gotten rid of by immediately correcting the error and not doing it again. Doing this regularly helps you to develop something else – integrity.
Imagine having no guilt, no shame, no fear and no regrets. You know what you would have? Freedom.
