Do not brag about tomorrow, For you do not know what each day may bring . — Proverbs 27:1, KJV
Matthew Henry, the great American Puritan wrote that this passage is about not being tardy because life is not in your power, so instead of making a resolution of what you will do tomorrow or “Next Year” do it now while you have few minutes and a get a start on it. This prevents other issues coming forward and stealing your resolution like storms, power outages or personal bad news that make “tomorrow” not a good day for much.
In my anguish... 