This quote addresses the tendency for some people to simplify their faith, viewing it as something easily understandable rather than embracing its deeper, more complex aspects. L'Engle reflects on how past teachings may have stripped faith of its beauty and mystery, leading to a superficial understanding of spirituality. She questions why younger generations often feel that their beliefs must fit into neat, manageable concepts, like a plastic representation of Jesus, rather than exploring the vastness and richness of faith. This simplification can limit personal growth and the freedom that comes from grappling with life's bigger questions. Ultimately, embracing the unknown in faith can lead to a more profound and fulfilling spiritual journey.