When you're young I pop in your brain, And from there I drive you insane. I'll ruin your love and take what you have, Your brain is my hand and your body, a glove.

The answer to the riddle is insecurity, a deeply impactful psychological state that often takes root during formative years. When individuals, particularly in childhood, don't receive adequate validation or consistent support, they may develop a profound sense of inadequacy or unworthiness, leading to persistent feelings of self-doubt. This initial vulnerability allows insecurity to "pop in your brain," and from there, it can indeed "drive you insane" by fostering chronic stress, anxiety, and even depression.

Insecurity manifests as a lack of confidence and a pervasive fear of rejection, failure, or judgment from others, influencing nearly every facet of life. It can profoundly "ruin your love" by creating trust issues, intense jealousy, and an insatiable need for external validation, which can strain and ultimately damage personal relationships. Furthermore, insecurity can "take what you have" by preventing individuals from pursuing goals, embracing new experiences, or recognizing their own worth, as self-doubt often leads to self-sabotage and missed opportunities. This pervasive influence can feel as though insecurity controls one's thoughts and actions, making the brain its "hand" and the body its "glove."