Verklingen: New wine and wineskins.
"Verily I say unto you, Whosoever shall not receive the kingdom of God as a little child shall in no wise enter therein." -- Jesus (Luke 18:17)
"a little child: is
paidion in Greek, meaning a
childling (of either sex), that is,
(properly) an infant.
An infant knows nothing yet. It is a brand new, unadulterated, "wineskin" ready for the "new wine".
Remember the Jedi's "padawan" learner (from
paidion) in Star Wars? And how Master Yoda told Luke "You must unlearn what you have learned"? He was telling him to purge the "old wine" and become a new wineskin, an infant, believing that anything is possible.
"In the beginner's mind there are many possibilities, but in the expert's there are few." -- Shunryu Suzuki