"It took me four years to paint like Raffael but a whole lifetime to paint like a child again."
This was said by no one less than Pablo Picasso. Even though his paintings had long been ranked by the art world among the best ever painted, learning to paint like a child was apparently a major concern of his.
Just watch children at play. In their games they create their own private world. We grown-ups perhaps don’t take this seriously and think “oh, they’re just playing”.