Ocean, Sea, Water.
(ים) “Im” is what the Hindus call the Akasha, which is the prime substance that fills the endless space (the Ain Soph).
The True Man
The letter ל Lamed is the staff of Moses, the rod of Aaron, which represent the creative fire of the letter Shin “raised upon a pole” as a brazen serpent, like Moses did. This creative fire, raised up the spinal column “healed the Israelites” (see Numbers 21). More specifically, it is the qenim (reed, cane) of the previous verse, but developed, enflamed. In the East, this is called kundalini. In the book of Acts, it is represented by the fire that alights on the heads of the apostles (after rising up their spinal columns).
The three mother letters, Aleph, Shin and Mem are related with the three main symbols: air, fire and water. So, they are called the three mother letters, and this is because only the feminine aspect has the power to give birth. All of us come from the womb of a woman. That is why they are called the three mother letters. These three mother letters are inside our own particular Monad, Spirit, which is in heaven.