Purposely directing and redirecting your attention is an important part of meditation training. You want to continuously cultivate your ability to intentionally direct attention to any object you choose, regardless of its intrinsic interest. You do this by redirecting attention, over and over again, back to the meditation object whenever it wanders. This is how directed attention leads to stable attention. If you’re reluctant to let go of an object you find particularly engaging, evoke discipline and diligence. Discipline doesn’t mean forcing the mind to do something it can’t, but rather a firm, intentional resolve to let go of an object that’s captured your attention and return to the breath. Being diligent means doing this consistently and promptly.
Like a muscle, the more you exercise this faculty, the stronger it grows. In other words, your conscious intention to redirect attention, repeated often enough, will gradually train your unconscious to do it automatically and almost instantly. Then, intentional movements of attention will replace spontaneous movements, and other things don’t capture your attention. By Stage Four, redirecting attention to the meditation object will become completely automatic.
Excerpt From: John Yates. “The Mind Illuminated.” iBooks.