You need to learn how to select your thoughts just the same way you select your clothes every day. This is a power you can cultivate. If you want to control things in your life so bad, work on the mind. That's the only thing you should be trying to control.

This quote is saying that it is important to be conscious of and in control of your thoughts. Just as you put thought into what outfit you choose to wear each day, you can work to develop the ability to make conscious decisions about your thoughts and the way you think. This is an important skill to cultivate because it can help you take control of your life. If it is important for you to feel a sense of control, focus on working to control your thoughts.