Ecclesiastes 4:16

4:16 There is no end to all the people nor to the past generations,

yet future generations will not rejoice in him.

This also is profitless and like chasing the wind.

Ecclesiastes 11:8

11:8 So, if a man lives many years, let him rejoice in them all,

but let him remember that the days of darkness will be many – all that is about to come is obscure.