The second part of Lee's series on deception
In The Lion, the Witch and the Wardrobe, the whole of Narnia is under a spell – the White Witch has decreed that it will be perpetually winter, and everywhere is covered in a blanket of snow.
Our world is likewise under a curse, and the blanket of snow could easily represent the effects of deception, acting like a curtain over our hearts, preventing us from seeing reality. As we saw in Part One last month, we are naturally prone to deceive and be deceived; as Jeremiah observed, it is the default setting of our hearts.