1:4-11
His first observation is that things go on regardless, “Generations come and go”, "the sun rises and the sun sets”, nothing we do affects any of this. The wind keeps blowing, and the rivers flow into the sea, but the sea never fills up ( this is the hydrological cycle). The eye keeps seeing, but never has enough of seeing. Likewise the ear never has enough of hearing., “there is nothing new under the sun”, “under the sun”, a phrase that recurs, essentially means “this life”. There is never anything genuinely new (except that God does a new thing). People live and die and are then forgotten.
1:12-18
`The Teacher applied his mind to wisdom to see if this could provide an answer, but this proved to be fruitless, yet we have this inbuilt urge to seek to understand.Solomon, or the teachers was a clever and wise man, but his wisdom got him nowhere, it only wore him out.