I love this and hadn't seen this in a while. I ran onto it on a great homeschooling blog. http://learningumbrella.homeschooljournal.net/. Thank you Sarah for this great reminder .
Finish every day and be done with it.
You have done what you could.
Some mistakes are made, for sure.
Forget them as soon as you can,
tomorrow is a new day;
begin it well and serenely,
with too high a spirit
to be burdened with your old nonsense.
This new day is too dear,
with its hopes and invitations,
to waste a moment on the yesterdays.
Ralph Waldo Emerson, adapted