Further reading, youthful mental characteristics appear to keep the brain plastic and adaptable to change. Remain childlike, with the accompanying sense of wonder and engagement in the world to retain your intellectual vigor:

https://www.hedweb.com/bgcharlton/ed-boygenius.html

From an evolutionary perspective, humans very much resemble juvenile chimpanzees physically. There is something about this neoteny that might give insights to our highly adaptable intelligence.