The offering of Isaac - Genesis22

Gen22
In Gen 21:11 it said that Abraham was greatly distressed.
It's interesting that in Gen 22 although the content is greatly distressing to us readers, it didn't seem to bother Abraham any more. There wasn't a word I can find that mentioned his mental or emotional state.
Gen22:1 "Now it came about after these things, that God tested Abraham..." A test is usually done when a student has finished his study, he has learned all his lessons, and the teacher put the test in to see if he really has learned or not. And in the end we found that Abraham has learned his lesson well and God was happy with the result.
So what was this test about?
To me the bottom line for this test is to see if Abraham is a whole person without Isaac.
To us the test can be are we whole without our achievements, purposes or dreams,etc...anything that describe and define who we are in the world.
I remember years ago a well known counsellor said this. He said his defining moment in his life was when God said to him, "I don't need your help, I give you a ministry because that will make you happy. But I don't really need you to do anything for me." That gave him a huge freedom.
It seems that everyone has this huge drive in them to achieve, to help save the world...
It's true that we're born with a purpose to fulfill, and without fulfilling that purpose we feel somewhat falling short.But does God need us to fulfil and achieve for Him? Not really. He can just show up and save the whole world in a minute, or do something like He did to Paul, make everyone blind and reveal Himself to everyone and the great commission will be fulfilled.
Does He really need us to help Him out? No. He just wants us to obey.
With this in mind, then even if you fail, it's still OK. Even if it means to take Isaac away, it's OK. Even if it means that there will be no descendants, no future generations, it's still OK. Cause worst of all, even if everyone died, God can always make another Adam and start all over again, can't He? He didn't need Abraham to help Him multiply and cover the earth.
If our worth comes from having to achieve, having to help God out, then we're not whole in Him and we're not free. We're still bound up by this purpose, in other words, the purpose, God's promise is still our idol.
Only a whole person can obey and sacrifice Isaac on the altar without winging, complaining and fighting; Only a whole person can rise up when he can't understand why his prayer didn't get answered; only a whole person can see the bigger picture in the midst of tragedy; only a whole person can still sing praises to God when his world is falling apart; only a whole person understands that the achievement in heaven can look totally different to achievement on earth...