(II) Indirect Discourse (Oratio Obliqua). In an indirect quotation the words or thoughts are given at second hand with certain modifications to indicate that the words or thoughts are reported.
a. The original form may be preserved except that there is a change from the first or second person to the third person: so πάντ' ἐθέλει δόμεναι H 391 reporting πάντ' ἐθέλω δόμεναι H 364. In such cases there is no grammatical dependence.
b. The narrator may report in dependent form the words or thoughts of a person from the point of view of that person. This is the common form of indirect discourse.
c. The narrator may report in dependent form the words or thoughts of a person from his own point of view. See cross2624.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].