By Extrovert or introvert—such are the either-or categories society has dictated. Whatever one of those you might tend to be, you are not one to the complete exclusion of the other. A quiet introverted-in-public person might be the loudest between siblings. A friendly out-going personality at a party might be a depressed recluse at home. Again, it is the book of Proverbs that brings balance to it all.
Generally an introvert might be applauded in Proverbs for being slow to speak, quick to hear, and slow to get angry. But one can be too introverted.
Whoever isolates himself seeks his own desire;
Proverbs 18:1
he breaks out against all sound judgment.
It certainly might not appear so on the outside, but often it is pure selfishness that motivates the more introverted moments in our lives. We might not want to be served by others, but we certainly don’t want to go out and serve others either, and so we stay by ourselves and do what we like—almost a textbook definition of selfishness.
The second line of the proverb warns of an even more serious condition, namely, that of not caring about good advice and input from others. Being an introvert might at times be a wise way to behave, but Proverbs brings balance for the overly introverted. Be sure to engage others in seeking wisdom. Seeking your own desire is selfish, and resisting the wisdom from others is detrimental to your maturity and wisdom. Accept advice, seek it, let others pray for you and with you.
As Christians we must be Biblically wise. The book of Proverbs navigates the waters of wisdom for us, helping us keep a balance where society has created either-or stereotypes.