i became a man and put away childish things
1 Corinthians 13 11 When I was a child, I spoke as a child, I understood as a child, I thought as a child; but when I became a man, I put away childish things. 12 For now we see in a mirror, darkly, but then face to face. Now I know in part, but then I shall know just as I also am known.
Narcissistic personality disorder Narcissistic personality disorder (NPD) is a personality disorder with a long-term pattern of abnormal behavior characterized by exaggerated feelings of self-importance, excessive need for admiration, and a lack of empathy.[2][3] Those affected often spend a lot of time thinking about achieving power or success, or on their appearance.[3] They often take advantage of the people around them.[3] The behavior typically begins by early adulthood, and occurs across a variety of social situations.[3]