This particular mantra is one of my personal ones that I have pop up on my phone during the day. To be honest, I got it from my favorite show The Vampire Diaries. It was this intense scene in season 7, episode 22, where Stefan was pointing out to his brother Damon that he didn't want to be like him. He stated that Damon says that he makes his decisions out of love, but it is actually out of fear, and that he himself refuses to be ruled by fear. That struck me deep, and since then I've been super conscious about the why behind my actions.
Were they out of fear or courage? Sometimes it can be so easy to lie to yourself, but this simple question really makes things easy to see. Live in courage.