In Thomas Pynchon's novel "Vineland," the character reflects on their past concerns about Zoyd's future. Over time, they realize that the struggles and experiences Zoyd has faced have helped him mature and gain clarity. This transformation is likened to the removal of the "Vaseline of youth," suggesting that youthful naïveté has given way to a more insightful perspective.

The imagery of a "mild detergent solution" signifies the cleansing process that comes with age and wisdom, implying that life’s trials have effectively washed away superficial perceptions. The speaker's newfound confidence in Zoyd illustrates a sense of reassurance, highlighting the theme of growth through experience.