Memories of childhood excite such profound nostalgia. Ahh! It's so brilliant and so sublime. While it must be remembered and called for assistance that memory idealises. Hence any remembrance is devoid of all the irritabilities and quirks that at times plague present moments.
So why is childhood especially striking? I guess that's the time when we were involved in a true awe and wonder of things around us. So there was a naive enquiry of phenomena which for the most part began to decline gradually. I guess we intuitively recognise this fact, and hence memories deliver a kind of our longing to get transported back to that state of perception.

Beginning to understand the statement that basically says: Geniuses are child-like. Old-age brings childishness.