What is the use of planning to be able to eat next week unless I can really enjoy the meals when they come ? If I am so busy planning how to eat next week that I cannot fully enjoy what I am eating now, I will be in the same predicament when next week's meals become "now."
If my happiness at this moment consists largely in reviewing happy memories and expectations, I am but dimly aware of this present. I shall still be dimly aware of the present when the good things that I have been expecting come to pass. For I shall have formed a habit of looking behind and ahead, making it difficult for me to attend to the here and now. If, then, my awareness of the past and future makes me less aware of the present, I must begin to wonder whether I am actually living in the real world.
-- The Wisdom of Insecurity by Alan Watts.