how can we begin to view human development from God’s perspective?

What do workers gain from their toil? I have seen the burden God has laid on the human race. He has made everything beautiful in its time. He has also set eternity in the human heart; yet no one can fathom what God has done from beginning to end. I know that there is nothing better for people than to be happy and to do good while they live. That each of them may eat and drink, and find satisfaction in all their toil—this is the gift of God.
Ecclesiastes 3:9-13 (NIV)
Questions to ponder:
In light of the scriipture passages, how can we begin to view human development from God’s perspective?
Although there are different stages of life, are there different passages to our lives?
Are stages and passages one and the same? If not, how are they different from one another?
Write a 200-word (give or take 10 words) on the devotion above addressing the questions to ponder.