According to Isaiah 45:1, Cyrus is YHWH's anointed, his Messiah:
Thus says YHWH to his anointed, to Cyrus whom I took by his right hand.
Scholars have long disputed this passage. Many agree with Charles Torrey and argue that all references to Cyrus should be removed as later additions; the prophet himself did not write them.Charles C. Torrey, The Second Isaiah (New York: Scribner's, 1928) 3–52; idem, “Isaiah 41,” HTR 44 (1951) 121–36; James D. Smart, History and Theology in Second Isaiah: A Commentary on Isaiah 35, 40–66 (Philadelphia: Westminster, 1964) 115–34; Jurgen van Oorschot, Von Babel zum Zion (New York: de Gruyter, 1993) 88. Other scholars assert that the name Cyrus is original, but admonish their readers not to interpret the title “anointed” as more than was intended. The act of anointing simply indicates a commission: Cyrus is to perform the office of king.Christopher R. North, The Second Isaiah (Oxford: Clarendon, 1964) 150; Roger N. Whybray, Isaiah 40–66 (Grand Rapids: Eerdmans, 1975) 104; Karl Elliger, Jesaja 40,1–45,7 (BKAT XI/1; Neukirchen-Vluyn: Neukirchener Verlag, 1978) 492; John D. W. Watts, Isaiah 34–66 (WBC 25; Waco, Tex.: Word Books, 1987) 156; Antti Laato, The Servant of YHWH and Cyrus: A Reinterpretation of the Exilic Messianic Programme in Isaiah 40–55 (Stockholm: Almqvist & Wiksell, 1992); idem, A Star is Rising: The Historical Development of the Old Testament Royal Theology and the Rise of the Jewish Messianic Expectations (Atlanta: Scholars Press, 1997) 173–85; Hugh G. M. Williamson, “The Messianic Texts in Isaiah 1-39,” in King and Messiah in Israel and the Ancient Near East (ed. J. Day; Sheffield: Sheffield Academic Press, 1998) 238–70; Brevard S. Childs, Isaiah (Louisville: Westminster John Knox, 2000) 353–54. Still others take a third position and assert that references to Cyrus are central to the theory of history presented in the Book of Isaiah.Claus Westermann, Isaiah 40–66 (OTL; Philadelphia: Westminster, 1969) 10, 159; Gerhard von Rad, Old Testament Theology (trans. D. M. G. Stalker; 2 vols.; United Kingdom: Oliver and Boyd, 1965) 2:238–62; John L. McKenzie, Second Isaiah (AB; Garden City: Doubleday, 1968) lxvi; Antoon Schoors, I Am God Your Saviour: A Form-Critical Study of the Main Genres in Is. XL–LV (VTSup 24; Leiden: Brill, 1973) 270; Rheinhard G. Kratz, Kyros im Deuterojesaja-Buch (Tübingen: Mohr, 1991) 15–17; Peter D. Miscall, Isaiah (Sheffield: Sheffield Academic Press, 1993) 110; Rainer Albertz, A History of Israelite Religion in the Old Testament Period (trans. J. Bowden; 2 vols.; OTL; Louisville: Westminster John Knox, 1994) 2:414; John N. Oswalt, The Book of Isaiah 40–66 (Grand Rapids: Eerdmans, 1998) 197. Cyrus is the promised redeemer of the Jews. Yet, even these scholars argue that Cyrus's anointing confers a temporary office, and does not evoke a permanent relationship; Cyrus has not converted to YHWHism, and the title should not be translated “Messiah.”Westermann, Deutero-Isaiah, 160–61; Joseph Blenkinsopp, Isaiah 40–55 (AB; New York: Doubleday, 2002) 248–49. Some do admit that the anointing does mean the end of the Davidic monarchy, however. What God once did through David, he now does through Cyrus.E.g., Westermann, Deutero-Isaiah, 160–61; Watts, Isaiah 34–66, 156.