YOURSELF

Etymology

Pronoun

yourself referring to the person being spoken to, previously mentioned (the reflexive case of you)

(reflexive pronoun) Your own self (singular).

You (singular); used emphatically, especially to indicate exclusiveness of the referent's participation in the predicate, i.e, that no one else is involved.

Pronoun

Yourself

Honorific alternative letter-case form of yourself, sometimes used when referring to God or another important figure who is understood from context.

Source: Wiktionary

Your*self", pron.; pl. Yourselves. Etym: [Your + self.]

Definition: An emphasized or reflexive form of the pronoun of the second person; -- used as a subject commonly with you; as, you yourself shall see it; also, alone in the predicate, either in the nominative or objective case; as, you have injured yourself. Of which right now ye han yourselve heard. Chaucer. If yourselves are old, make it your cause. Shak. Why should you be so cruel to yourself Milton. The religious movement which you yourself, as well as I, so faithfully followed from first to last. J. H. Newman.

Source: Webster’s Unabridged Dictionary 1913 Edition