In plain words
One sun appears in many pots of water. In the same way, the Self shines in every embodied mind and seems to be many, while remaining one pure consciousness. I am that Self, which is already established and need not be newly attained.
Word for word
Like the one sun appearing in the water of every pot, He shines in the mind situated in each body and appears as many, yet is one alone, pure consciousness, not something newly attained. I am that ever-established Self.