It is often the case that whatever we are doing, be it sitting, walking, standing, or lying, the mind is frequently disengaged from the immediate reality and is instead absorbed in compulsive conceptualization about the future or past. While we are walking, we think about arriving, and when we arrive, we think about leaving. When we are eating, we think about the dishes and as we do the dishes, we think about watching television. This is a weird way to run a mind. We are not connected with the present situation, but we are always thinking about something else. Too often we are consumed with anxiety and cravings, regrets about the past and anticipation for the future, completely missing the crisp simplicity of the moment.

~ B. Alan Wallace, Tibetan Buddhism from the Ground Up