The wandering mind visits
If the 'wandering mind' turns up, please don't pay any attention. Treat it as an uninvited quest. When you don't pay it any attention, it will leave you. In this way you can keep continue focusing to picture, feeling or mantra at your center. The more continuously you can be peaceful at your center, the closer you will feel to your inner energy, and the more you feel calm and prefer to be with your center and forget all disturbances.