When you are humble like a child, you sit quietly and listen to instructions and teaching. When you lose this humility , you no longer sit quietly and listen to instructions, teachings and guidance.
Children sit quietly and receive instructions in the classroom. Grown-ups are able to gather them into groups and teach them. When people are filled with pride, they resent being put in a group. They resent having to be a part of little groups that are being taught.
And said, verily I say unto you, Except ye be converted, and BECOME AS LITTLE CHILDREN, ye shall not enter into the kingdom of heaven…..Matthew 18:3