Anger is the real destroyer of our good human qualities; an enemy with a weapon cannot destroy these qualities, but anger can. Anger is our real enemy.
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.