Everyone is still a child in one way or another.
A child knows very little and is just trying to find his or her way. A child imagines what he or she wants to be true. A child’s feelings are easily hurt. A child depends on others for survival. A child laughs and cries. A child wants his or her own way and will sometimes take it from others by force or by being cunning. A child avoids responsibility and hides or lies when he or she does something wrong.
None of us have fully outgrown our childhood. The child is still in there — still driving much of our thoughts and behaviors. By recognizing that, we can continue to grow. We can continue moving toward maturity. (Though there are some parts of our childlike nature that should be embraced: creativity, humor, wonder etc.)