James 4:14

when, all the while, you do not even know what will happen to-morrow. For what is the nature of your life? Why, it is but a mist, which appears for a short time and then is seen no more.

1 Peter 1:24

"All mankind resemble the herbage, and all their beauty is like its flowers. The herbage dries up, and its flowers drop off;

1 John 2:17

And the world, with its cravings, is passing away, but he who does God's will continues for ever.

James 1:10

but a rich man should rejoice in being brought low, for like flowers among the herbage rich men will pass away.

1 Peter 4:7

But the end of all things is now close at hand: therefore be sober-minded and temperate, so that you may give yourselves to prayer.

Treasury of Scripture Knowledge

Summary

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.

Bible References

A vapour

James 1:10
but a rich man should rejoice in being brought low, for like flowers among the herbage rich men will pass away.
1 Peter 1:24
"All mankind resemble the herbage, and all their beauty is like its flowers. The herbage dries up, and its flowers drop off;
1 Peter 4:7
But the end of all things is now close at hand: therefore be sober-minded and temperate, so that you may give yourselves to prayer.
1 John 2:17
And the world, with its cravings, is passing away, but he who does God's will continues for ever.