It is worth accenting the point here that other people shape us. The “who” that we become does not happen regardless of others, but rather because of others. It is important to realize that every person’s interaction with a child has an effect on the person that child will become. Who they are is a result of the many people they are in contact with.
This is why parents are exceptionally important people. They primarily do the shaping of the personality. Everyone the parents allow to come into contact with that child contributes. A bad parent is going to establish bad qualities in their child. It is important to become a good person in order to be a good parent. We train our children to have good habits so that they will become a person that is good for others, for society, for God, and for themselves. Neglecting to lead a child in developing good habits means their personhood will not be where it should be. Bad habits and bad character traits are the result. A person of bad character is not only acting badly, they are not growing better as a person. We are created to become the fullest good person possible who acts in ways that benefit others and God.
Socializing with other human beings is an inescapable aspect of developing into a person. Some parents, motivated by concern that their child might be badly influenced, will shelter their children. The risk of an under-socialized child, however, can be far worse for that child than the times they witness something the parent preferred they not witness. The person they become can be socially crippled, lacking skills that are necessary to function and succeed. A child that spends excessive time involved with antisocial activities (e.g., computer/video games, excessive phone use, headphones in their ears, or anything isolating), can turn out the same way. This produces antisocial and under-developed persons (immature adults), as they can tend to remain adolescent in their behavior.
These immature, now adult persons are then sent out into society. The primary society and social function affected by this is the institution of marriage. And the result is bad marriages between people not capable of the demands of marriage. But that is a topic for another time.
It is important to understand that the person we become is a result of the people we interact with during our life. The person we will be in Heaven is intimately connected to other people who helped form us. This is why in Heaven, we will still be social beings. It won’t be only looking at the Face of God, but we will walk with those whom we were close to in this life, and meet those who influenced the person we became.
Social interaction is necessary to form the person. Experiencing all kinds of people, including those who are not attractive to us as people or who have different views, etc., enhances the process toward becoming a good person. This is what makes good friendship such a treasured thing. A good friend enhances the person we are. We become a better person because of the relationship. Friendships with people who do bad or harmful things will drag us down and make us worse people. Therefore, those we choose to bring closer into our lives is a big deal, because they will play a major role in making us the person we continue to become.