How can you master yourself? Personally, this has been a focus of mine over the last several years, with specific focus on how I can master myself by changing the words I use to talk to myself. Eliminating phrases such as "I can't," "I don't," "I won't," and "I have to" and replacing them with "I choose to," "I prefer to," "I desire to," and "I have decided to" has been a huge step. It impacts what thoughts I allow to take hold in my mind, how I process and work through emotions, how I mentally deal with rejection. This is all just one small piece of how to master oneself.