So I am reading and digesting TRP. However, I am not sure if I am quite understanding the difference between standing up for yourself vs defending yourself? For example The other day my roommate told me to wash my dishes properly I stood up for myself and said I had not unpacked the dishwasher yet and the dishwasher cleans better than hand washing and literally showed him what the fork looked like.

What would be the difference here between standing up vs defending myself?