"It is the unknown we fear when we look upon death and darkness, nothing more." - Albus Dumbledore
"There is nothing worse than death, Dumbledore!" - Voldemort
"You are quite wrong." - Albus Dumbledore
The Moon is a card of illusions and mysteries. It encompasses the fear of the dark and unknown, yet it can also carry wild inspiration and imagination. While the night is unfamiliar and sometimes frightening, it also holds potential for the unusual.
One major theme in the HP book series is mastery over death: Grindlewald wishes for the power to dole out death as he sees fit, Dumbledore longs to reverse death to atone for his guilt, Voldemort tries to permanently flee death for his fear of it, but Harry is the only one to truly overcome death by his courage, insight, and selflessness. The tale of the Deathly Hallows reflects this morality - the Elder Wand and the Resurrection Stone could not deny Death by trying to dominate or counter it; they only led to premature misery. Instead, the Invisibility Cloak avoids these conflicts against nature, allowing Ignotus Peverell to face Death peacefully when he is prepared to welcome it. As a part of nature, death is not a power to be overly feared or misunderstood, but accepted when the time and cause is right.