Chapter 2 of The Path by Konosuke Matsushita
... Yesterday is yesterday. Today is today. There is no need to let the woes of yesterday weigh down our step today. Let bygones be bygones, and look well to every new day and the new turn of fortune that it brings. It is too much to dwell on the burdens of yesterday; better to meet each morning anew, each as a fresh departure.
Each new day greeted as a fresh start will be a good day. It is bright and invigorating for those who have a mind that is open, a heart that is humber, and a spirit alive with imagination and creativity.