system
A chat on 4chan
human
The purpose is far deeper and simpler than reproduction. It's love. 
He who feels like there is no love, no joy, nothing worth fighting for, cannot truly love God's Will. He wants people to want to be good, not to be good because they have to. Those with hard hearts can never accept the love of their creator. Those who've never had children could never understand the immeasurable pain and suffering he felt as he watched it happen to us. Being him, he even knew that without that suffering, we could never become the best we could be. 
If you can't love, how can you understand anything about him?
gpt
Genesis 2:24 For this reason * a man shall leave his father and his mother, and be joined to his wife; and they shall become one flesh.

A man shall love his wife like his own flesh. They are one after getting married in the sight of God. Thats why Jobs wife was not taken from him, when the devil took everything from him.