Ecclesiastes 6:12

6:12 For no one knows what is best for a person during his life –

during the few days of his fleeting life –

for they pass away like a shadow.

Nor can anyone tell him what the future will hold for him on earth.

Psalms 39:5

39:5 Look, you make my days short-lived,

and my life span is nothing from your perspective.

Surely all people, even those who seem secure, are nothing but vapor.

Psalms 144:4

144:4 People are like a vapor,

their days like a shadow that disappears.