Paul refers to believers who have not grown spiritually as if they were children who have had very little experience in life. AT: "be like children" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This speaks of a believer who has not become mature and follows wrong teaching as if that believer were a boat that the wind is blowing in different directions on the water. (See: [[rc://en/ta/man/translate/figs-metaphor]])
Paul uses the human body to describe how Christ causes believers to work together in harmony as the head of a body causes the body parts to work together to grow healthy. (See: [[rc://en/ta/man/translate/figs-metaphor]])