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.
KJV
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.
ASV
whereas ye know not what shall be on the morrow. What is your life? For ye are a vapor that appeareth for a little time, and then vanisheth away.