Why, you do not even know what will happen tomorrow. What is your life? You are a mist that appears for a little while and then vanishes.
NIV
Yet you do not know [the least thing] about what may happen tomorrow. What is the nature of your life? You are [really] but a wisp of vapor (a puff of smoke, a mist) that is visible for a little while and then disappears [into thin air].
AMP
Whereas ye know not what shall be on the morrow. For what is your life? It is even a vapour, that appeareth for a little time, and then vanisheth away.
KJV
"Meaningless! Meaningless!" says the Teacher. "Utterly meaningless! Everything is meaningless."
NIV
Vapor of vapors and futility of futilities, says the Preacher. Vapor of vapors and futility of futilities! All is vanity (emptiness, falsity, and vainglory). [Rom. 8:20.]AMP
Vanity of vanities, saith the Preacher, vanity of vanities; all is vanity.
KJV