Don’t boast about tomorrow,
for you don’t know what a day might bring.

In the morning sow your seed,
and at evening do not let your hand rest,
because you don’t know which will succeed,
whether one or the other,
or if both of them will be equally good.

Yet no one knows what will happen because who can tell him what will happen?

You don’t even know what tomorrow will bring—what your life will be! For you are like smoke that appears for a little while, then vanishes.

He said, “Look, I am old and do not know the day of my death.

For man certainly does not know his time: like fish caught in a cruel net or like birds caught in a trap, so people are trapped in an evil time as it suddenly falls on them.

“Certainly, man walks about like a mere shadow.
Indeed, they frantically rush around in vain,
gathering possessions
without knowing who will get them.

When the king of Ai saw the Israelites, the men of the city hurried and went out early in the morning so that he and all his people could engage Israel in battle at a suitable place facing the Arabah. But he did not know there was an ambush waiting for him behind the city.

And our enemies said, “They won’t know or see anything until we’re among them and can kill them and stop the work.”

But disaster will happen to you;
you will not know how to avert it.
And it will fall on you,
but you will be unable to ward it off.
Devastation will happen to you suddenly
and unexpectedly.

“And now I am on my way to Jerusalem, bound in my spirit, not knowing what I will encounter there,

They answered, “The man kept asking about us and our family: ‘Is your father still alive? Do you have another brother?’ And we answered him accordingly. How could we know that he would say, ‘Bring your brother here’?”