Mem (מ, ם) means "water," symbolizing the hidden and revealed worlds. Its standard form represents the flowing, revealed waters of consciousness, while its final, closed form (Mem Sofit) symbolizes the deep, hidden waters of the super-conscious and the unmanifest. Mem is the letter of emotional purification and the cosmic "womb." In Kabbalah, it is the power of nature and the fluid state of reality, essential for understanding the spiritual mysteries of birth and dissolution.