" When you practice mindfulness, the first thing you are likely to notice is how mindless you can be. Let’s say you decide to focus on the feeling of the breath moving in and out of the body. It is happening in the present moment. It is important. You can’t live without breathing. It is not hard to locate the sensations in the body associated with breathing, at the belly or in the chest, or at the nostrils. You might find yourself saying, “What is the big deal? I will just keep my focus on the breath.” Well, lots of luck with that one. Because invariably, you will find that the mind has a life of its own and is not interested in taking orders from you about staying focused on the breath or anything else. So it is very likely that you will find your attention dissipating over and over again, forgetting about this breath in this moment, and being preoccupied with something else — anything else — in spite of your own best intentions. This is just part and parcel of the landscape of meditation practice, and it tells you something about the nature of your own mind. "

― Jon Kabat-Zinn , Mindfulness for Beginners