"Finish each day and be done with it. You have done what you could; some blunders and absurdities have crept in; forget them as soon as you can. Tomorrow is a new day; you shall begin it serenely and with too high a spirit to be encumbered with your old nonsense. "
One of my favourites.. The importance of letting go of one's past, purging one's mind of all negativities and making a fresh beginning cannot be overstated. It's sometimes the simplest medicine to all our worries.. Just that it's one pill that's not very easy to swallow :-)