yourself

Your own self (singular).

Be careful with that fire or you'll burn yourself.

After a good night's sleep you'll feel like yourself again.

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

You yourself know that what you wrote was wrong.

You (singular); even when "you" has not been used previously; see usage notes.

I spoke with yourself last in February.

No one understands me like yourself.

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