In short, it is the one Real I that plays the part of innumerable false I s in multifarious ways and in varying degrees. The main support of the false I is ignorance, and this false I utilizes three channels for its expression — the gross [physical] body, the subtle body [energy] and the mental body [mind]. In other words, with the support of ignorance, the Real I takes itself as the false I and tries to derive as much fun out of it as possible. While continuing to derive fun, it is also continually enduring setbacks and suffering. What happens eventually? The Real I eventually gets fed up and stops playing the part of the false I. As soon as the Real I stops playing the part of the false I, it becomes conscious of its [Original] pristine state. This Consciousness is eternal. And it also realizes that, being eternally happy, its experience of being fed up was sheer, nonsensical ignorance.
The Real I, when playing the part of the false I, as the false I, whatever it does, sees, feels, thinks, understands and says is [utterly] false, because the false I is virtually false itself.
The aim of all yogas is one: the false ego, or the falsity of the split ego, should disappear, and the Real Ego be manifested in its glory. In other words, the Real I, which plays the part of the false I, should completely forget to play the part it plays of the false I through action and search for Reality.
For example, take Eruch. He is the Real I within; but as Eruch, he is the false I. Now the Real I within Eruch tries to forget that it is only playing the part of the false I as Eruch. While trying to do so, the false I as Eruch tries its best to serve so many other false I s. This it does by actions; it is called karma yoga. But the fun or irony is that one false I, in its struggle to forget, to efface itself, remembers so many other false I s, while bent upon serving them.
The Real I , which is eternally free, gets apparently further bound by this process, and it is eternally trying to forget the false I and trying to remember the Real I at one and the same time.
In another type of yoga [bhakti yoga], the Real I, while acting the part of the false I, tries to worship the Real.