The key principles to becoming invulnerable to attack and criticism from others is as follows:
First, you must own your 100% personal power at all times and maintain self-mastery over your thoughts and emotions at all times. For, in truth, the only thing that can hurt you is your own thinking. It is your own thinking that determines if you can be hurt or not. You are the cause of your own reality! You are the cause of your own thoughts and emotions! The only thing that can hurt you is your own victim consciousness and/ or negative ego/fear-based/separative thinking.