The essence of a get [is]: “You are permitted to every man.” R' Yehudah says: “And this, which shall be to you from me, [is] a writ of divorce, a letter of abandonment, and a bill of release, to go to be married to any man that you want.''  The essence of a document of emancipation [is]: “You are a free woman,” [or] “You are to yourself.”