C.S. Lewis illustrates the idea that just as a key's mold is designed specifically for a corresponding lock, our souls are uniquely shaped to fulfill a purpose in the divine plan. He compares our essence to a key that unlocks a door in a vast spiritual realm, suggesting there is a specific space crafted for each individual in the afterlife. This conveys the notion that our lives and destinies are intricately tailored, echoing the depth of the divine arrangement around us.

Moreover, Lewis emphasizes that our existence is purposeful, akin to a glove fitting a hand perfectly. Each individual is made deliberately for their place in heaven, suggesting that our unique attributes and experiences are integral to a greater design. The imagery of being crafted "stitch by stitch" reinforces the idea that we have a significant role to play in a larger cosmic narrative, underscoring the interconnection between our earthly lives and our eternal destinies.