Here is an excerpt from my book, The Silent Master: Awakening the Power Within:
It’s a two way process. For instance, when you encourage your body to go the extra mile around the track, one more mile than you did the day before, you’re sending a message to your mind to the effect, “I can grow; I can change; I can break limits.” This good message that your mind receives when you demand extra performance from your body then goes on to encourage even better performance, and not just in running. The message will now extend to other areas of your life. “I can grow; I can change; I can break limits” could also help you create new and better procedures at work that result in a promotion or a better position.