40 years is also a significant age within Islam, whereby a person usually reaches their prime. Explicitly mentioned in this verse for example:
"We have commanded people to honour their parents. Their mothers bore them in hardship and delivered them in hardship. Their ˹period of˺ bearing and weaning is thirty months. In time, when the child reaches their prime at the age of forty, they pray, “My Lord! Inspire me to ˹always˺ be thankful for Your favours which You blessed me and my parents with, and to do good deeds that please You. And instil righteousness in my offspring. I truly repent to You, and I truly submit ˹to Your Will˺.”[1]
Interesting. Thanks for the recommendation! Do you know of any books that also account for drawing or diagramming alongside writing? I wonder if those can particularly help for programming or general problem solving.
"We have commanded people to honour their parents. Their mothers bore them in hardship and delivered them in hardship. Their ˹period of˺ bearing and weaning is thirty months. In time, when the child reaches their prime at the age of forty, they pray, “My Lord! Inspire me to ˹always˺ be thankful for Your favours which You blessed me and my parents with, and to do good deeds that please You. And instil righteousness in my offspring. I truly repent to You, and I truly submit ˹to Your Will˺.”[1]
[1]https://quran.com/46/15