@Spice Hi again. I looked up a couple of things about what you said, and here's (in part) what I found:
Ecclesiastes 9:10 in the New Revised Standard Version (couldn't find exactly the Revised Standard Version online, maybe I missed it), says this:
"Whatever your hand finds to do, do with your might; for there is no work or thought or knowledge or wisdom in Sheol, to which you are going." Your thoughts, please...
Sheol, in most eras and sects, is a place where both the righteous and unrighteous go after bodily death. It's somewhat the Jewish version of Roman Catholic Purgatory. Of course there are many variations.
IMO, Ecc 9:10 refers to that when you reach this point of the salvation journey, there is nothing for you to say or do, for you will be judged according to the progress made thus far. It is finished.
Look to the next verse: Ecc 9:11 "Again I saw under the sun the race is not to the swift, nor the battle to the strong, nor bread to the wise, nor riches to the intelligent, nor favor to the men of skill; but time and chance happen to them all."
I take this as one's worldly accomplishments, of body or mind, mean nothing. None of that goes with you to Sheol.
Ecc 12:13 "The end of the matter; all has been heard. Fear (Honor) God, and keep His commandments; for this is the whole duty of man. For God will bring every deed into judgement, with every secret thing, whether good or evil." And that's where The Preacher leaves it.
But Jesus, while absolutely agreeing, adds [Mt 5:26] "truly I say to you, you will never get out till you have paid the last penny." [Mt 6:34] "Therefore do not be anxious for tomorrow, for tomorrow will be anxious for itself. Let the day's own trouble be sufficient for the day."
So if we must pay our debts, and the only end-game is Sheol where there is only stillness and darkness, why would Jesus advise to not be anxious and concerned about our tomorrows?
Namaste