You must consider that in the beginning you are training the mind as well as the body. The mind, after all, makes you want to
train; it turns on the body. Because the mind motivates you to train the body, you have to train the mind first. If the mind
doesn’t want to lift weights, the body won’t lift them. 

 Once you’ve gained mastery over it, channeling its powers positively for your purposes, you can do just about anything.

 The secret is to make your mind work for you—not against you. This means constantly being positive,
constantly setting up challenges you can meet—either today, next week, or next month. “I can’t. . .” should be permanently
eliminated from your vocabulary, especially from  your thoughts.