Does the past take up a great deal of your attention? Do you frequently talk and think about it, either positively or negatively? The great things that you have achieved, your adventures or experiences, or your victim story and the dreadful things that were done to you, or maybe what you did to someone else? Are your thought processes creating guilt, pride, resentment, anger, regret, or self-pity? Then you are not only reinforcing a false sense of self but also helping to accelerate your body's aging process by creating an accumulation of past in your psyche. Verify this for yourself by observing those around you who have a strong tendency to hold on to the past.
— Eckhart Tolle