From the time we are infants and discover this body and mind that manipulates us and in turn is manipulated by us, we feel certain that this body and mind is ourself, is who we are. That identification becomes so strongly rooted in us, that never once do we doubt that we are this particular mind and body limited in space and time, and any suggestion to the contrary strikes us as bizarre and absurd. But, say the seers, the Buddhas, it is merely case of mistaken identity; that which is born, thrives for awhile, and then decays, is not who you are.
You are the one Mind of the universe, which merely witnesses all this world of changing forms, but is never affected by it. You are the Eternal, but you see this transient world of forms and think, “This is me!” It is like a man who, dreaming that he is being roasted alive, suffers the pain from the heat of the imagined flames; or like a man who is frightened by a snake which, on closer inspection, turns out only to have been a piece of rope.
It sometimes happens that a man, when bathing in the river, steps upon a wet rope and imagines that it is a snake. Terror will overcome him, and he will shake with fear, anticipating in his mind all the agonies caused by the serpent’s venomous bite.
What a relief does this man experience when he sees that the rope is no snake. The cause of his fear lies in his error, his ignorance, his illusion. If the true nature of the rope is recognized, his tranquility of mind will come back to him; he will feel relieved; he will be joyful and happy. This is the state of mind of one who has recognized that there is no selfhood (ego), and that the cause of all his troubles, cares, and vanities is a mirage, a shadow, a dream.
Here, is the essence of the teaching of all the seers. It should be apparent, of course, that the “selfhood” refered to here is not the Self (Atman) of the Upanishads, which is synonymous with the Eternal, but is the false sense of self, the ego. When the Truth is realized, the false idea of an individual self is dissolved, like the idea of the snake which is really a rope.
Then it is seen that, in reality, no separate self exists or ever existed; it is a mirage, a mistaken interpretation of one’s own awareness, which is really the immortal and eternal Self, the Absolute. Only that One is real; It is the Self of the universe, the universal Being which manifests as all beings, all things. It is the knowledge of this Self which is the source of the joy and happiness of the enlightened.
by S Abhayananda, from: History of Mysticism