(It is my intention to add to this a couple times a week. Please question, discuss, add, disregard, or adopt as you see fit. These are my words, adapted from various sources and teachers. Please do not copy or repost without my consent. May they be of use in some form or another.)
#1 UPSET IS OPTIONAL
Whether or not we choose emotional upset is 100% our choice. We are not slaves to our emotions, and we can learn how to be otherwise. No person, event, or circumstance can MAKE us upset; rather, we choose it, no matter how much we'd like to believe otherwise.
Your mother's words did not MAKE you angry; rather, in the presence of your mother's speaking, you *chose* to feel angry. We must take personal responsibility for our own emotions and upsets. They are within our control.
Especially for practitioners of magic, if you cannot control your own thoughts and emotions, how will you ever seek to control the Universe through your spellcasting?
Remember, in the face of any upset or strong emotion: Upset is Optional - i can choose to react to this differently :)