Childlike Humility in the Kingdom

Regarding childlike humility in the kingdom, these passages say that becoming like children or receiving the kingdom like a child is necessary for entering it. In Matthew, the speaker says that unless people turn and become like children, they will never enter “the kingdom of the heavens” (Matthew 18:3). Mark and Luke similarly state that whoever does not receive the kingdom of God as, or like, a child will never enter it (Mark 10:15; Luke 18:17). The word or idea recurs in at least 3 verses across 3 books.