J.R Miller wrote this story in a devotional thought based upon Lk 2.12.
Yes! that is the meaning of it all. It tells of the good will of God toward all men. There is a strange medieval legend which illustrates this truth. An infidel knight, in the wildness of his mad, Heaven-defying infidelity, determined to test, by the method to which as a knight he was accustomed, the reality and power of the God whose existence he denied.
So, going out into the field, armed as if for combat, he cast his glove down upon the ground, after the manner of the ancient challengers, and cried out to the heavens: “God! if there be a God, I defy thee here and now to mortal combat! If thou indeed art, put forth thy might, of which thy pretended priests make such boasts.” As he spoke, his eye was caught by a piece of parchment fluttering in the air just above his head. It fell at his feet. He stooped and picked it up, and found inscribed upon it these words, “God is love!” Overcome by this unexpected response, he broke his sword in token of his surrender, and kneeling upon the fragments, consecrated his life henceforth to the service of that God whom he had just before defied.