One thought that crossed my mind studying the Kanji Mu is the picture from the Phoenix rising from the Ashes?
[..] The bottom four strokes indicate fire flames, the character in the middle indicates a house, and the top lines represent a new life emerging from the burning home. When the house burns down and becomes ashes, new life can grow from that. The kanji (mu) teaches us that although we may lose everything, new opportunities may arise.