This Syrian - The words are emphatic. Gehazi persuades himself that it is right to spoil a Syrian - that is, a Gentile, and an enemy of Israel.
As the Lord liveth - These words are here a profane oath. Gehazi, anxious to make himself believe that he is acting in a proper, and, even, in a religions spirit, does not scruple to introduce one of the most solemn of religious phrases.