Emphatic pronoun emphasizes the noun.
|I myself completed the homework.
It means that the subject itself completed the homework without anyone’s help
Now look at the following sentences:-
|I will do it myself
|I myself saw him do it
|We will see to it ourselves
|You yourself can best explain
|They themselves admitted their guilt
It will be seen that here Compound Personal Pronouns are used for the sake of emphasis, and are therefore called Emphatic Pronouns