[T]omorrow is a new day. You shall begin it well & serenely, & with too high a spirit to be cumbered with your old nonsense. This day ... is too dear with its hopes & invitations to waste a moment on the rotten yesterdays.
It is not enough to want to make the effort and to say we'll make the effort. We must actually make the effort. It's in the doing, not just the thinking, that we accomplish our goals. If we constantly put our goals off, we will never see them fulfilled. Someone put it this way: Live only for tomorrow, and you will have a lot of empty yesterdays today.
The body loaded by the excess of yesterday, depresses the mind also, and fixes to the ground this particle of divine breath.
[Lat., Quin corpus onustum
Hesternis vitiis, animum quoque praegravat una
Atque affigit humo divinae particulam aurae.]
With the mistake your life goes in reverse. Now you can see exactly what you did Wrong yesterday and wrong the day before And each mistake leads back to something worse.