“Finish each day and be done with it. You have done what you could. Some blunders and absurdities no doubt crept in; forget them as soon as you can. Tomorrow is a new day; begin it well and serenely and with too high a spirit to be encumbered with your old nonsense.”
The idea behind the quotation
At the end of each day, accept that you did your best, let go of mistakes, and begin tomorrow with a calm, hopeful mind.