In many bad ways, we never stop being little children. Their faults are
obvious and unhidden; adults add a layer that they suppose is
sophistication to their sin. To God though, this is simply childish: he
sees right through it, even if we persuade ourselves that it was very
clever and cunning.
In other ways, we need to become like little children again: to trust
God, to lose our guile and "sophistication", to take simple delight in
God and his world. To enjoy each blessing in the voyage of discovery of
both for its own sake, instead of trying to fit it into some personal
masterplan which isn't God's (c.f. the book of Ecclesiastes).