What then is the purpose?
Everlasting also does not mean unchanging. That is called death or nothingness. It means ever changing with an unchanging pattern of purpose.
So we can resonance with Paul in 1 Thessalonians 5:16-18 (NIV)
16 Rejoice always, 17 pray continually, 18 give thanks in all circumstances;
for this is God’s will for you in Christ Jesus.
Taking the verses in reverse, if I can't rejoice in this present circumstances, perhaps I have forgotten it is God's will for me in Christ Jesus.
If we still can't get it, we should 'pray', or talk to God one on one. Speak to him of your worry, of anger, of don't get it ... He can take all we can throw at Him for He loves us.
After our verbose and emotional screams or plead, be careful to wait and listen for His answer and comforting touch. Heb 4:16 may helps ... in time of need, boldly comes to His throne of mercy to find the grace and power that we need. Also, Hebrews 10:22 let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience and our bodies washed with pure water.
Don't leave the conversation with God until we get our peace.
Lim Liat (c) 22 May 2019