It is a difficult question. But it is not unanswerable. Suppose you have a glass of milk , you will say it is milk. Now if you boil it ,you can not say it was same milk as it was before. If you leave it ,it will change into curd. You are now calling that milk, curd. If you boil milk enough it changes into Ghee (Indian cheese). The milk has become Ghee. The ...
The answer to your question can be found in the following quote, from SN 22.1:
“How is one afflicted in body and afflicted in mind?
Here, the uninstructed worldling, ... , who
is not a seer of superior persons and is unskilled and undisciplined
in their Dhamma, regards form as self, or self as possessing form, or
form as in self, or self as in form. He ...
First of all there is a doctrine of self to which there can be a clinging.
This doctrine is of several types, ie;
mind is held to be a self
body is held to be a self
mind & body are held to be a self
everything external & internal is held to be a self
These doctrines are included in 'ideation' which can be understood to be a function of the nervous ...