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 enbered with your old nonsense. ~ Emerson
When I was in high school physics, we had to hit golf balls and measure how far they went to determine the height they reached. Having never played golf before, my ball rolled straight in front of me across the field. The physics teacher (who was also the baseball coach, incidentally) measured the distance and told me to calculate how high my ball had traveled. Somehow, the answer came out to be a negative number.
The moral: I have the inate ability to take things lower than you possibly think they can go.