Self - Words used in A Course in Miracles

   Your mind is split between a made-up-identity, and your Self, defined by God. 
  

It is clear that while the content of any particular ego illusion does not matter, its correction is more helpful in a specific context. Ego illusions are quite specific, although the mind is naturally abstract. Part of the mind becomes concrete, however, when it splits. The concrete part believes in the ego, because the ego depends on the concrete. T-4.VII.1:1-4.

Eating of the fruit of the tree of knowledge is a symbolic expression for usurping the ability for self-creating. This is the only sense in which God and His creations are not co-creators. The belief that they are is implicit in the "self-concept," or the tendency of the self to make an image of itself. Images are perceived, not known. Knowledge cannot deceive, but perception can. You can perceive yourself as self-creating, but you cannot do more than believe it. You cannot make it true. … You still believe you are an image of your own making. Your mind is split with the Holy Spirit on this point, and there is no resolution while you believe the one thing that is literally inconceivable.       T-3.VII.4:1-6,10,11. 

There is another vision and another Voice in which your freedom lies, awaiting but your choice. And if you place your faith in Them, you will perceive another self in you. This other self sees miracles as natural. They are as simple and as natural to it as breathing to the body. They are the obvious response to calls for help, the only one it makes. Miracles seem unnatural to the ego because it does not understand how separate minds can influence each other. Norcould they do so. But minds cannot be separate. This other self is perfectly aware of this. And thus it recognizes that miracles do not affect another's mind, only its own. They always change your mind. There is no other.           T-21.V.3:1-12.