" We rarely see that “past” and “future” are happening right now. All that there is, is an unfolding of present moments. We have created these concepts to serve a useful purpose, but by taking the ideas to be the reality, by not understanding that they are merely the product of our own thought processes, we find ourselves burdened by worries and regrets about the past and anxieties of anticipation about what has not yet happened. "

― Joseph Goldstein , The Experience of Insight: A Simple & Direct Guide to Buddhist Meditation (Shambhala Dragon Editions)