Family dynamics can be interesting. Especially as siblings grow up. The older a child gets, the more knowledge they gain. They use this new found knowledge on the younger siblings in a condemning way. You are not doing it right, like coloring in the lines, or riding a bike, or playing a game. They can become a judge instead of a helper. Paul knows that these same things happen in the family of God. He addresses this with a teaching that will hopefully dispel the judge attitude and cultivate the servant attitude in the family of God