The debate between premillenarians and other millenarians hangs to a large extent upon the principles of interpretation of Scripture which each group employs. This is commonly recognized by all parties. The amillenarian Albertus Pieters states, “The question whether the Old Testament prophecies concerning the people of God must be interpreted in their ordinary sense, as other Scriptures are interpreted, or can properly be applied to the Christian Church, is called the question of spiritualization of prophecy. This is one of the major problems in biblical interpretation, and confronts everyone who makes a serious study of the Word of God. It is one of the chief keys to the difference of opinion between Premillenarians and the mass of Christian scholars. The former reject such spiritualization, the latter employ it; and as long as there is no agreement on this point the debate is interminable and fruitless.”3 In principles of interpretation the crux of the controversy is revealed.
The premillennial position is that the Bible should be interpreted in its ordinary grammatical and historical meaning in all areas of theology unless contextual or theological reasons make it clear that this was not intended by the writer. Amillenarians use the literal method in theology as a whole but spiritualize Scripture whenever its literal meaning would lead to the premillennial viewpoint. This is obviously a rather subjective principle and open to manipulation by the interpreter to sustain almost any system of theology. The conservative amillenarian claims to confine spiritualization to the field of prophecy and interpret other Scriptural revelation literally. Thus a conservative amillenarian would accept literally passages teaching the deity of Christ, the substitutionary atonement, the resurrection of Christ, and similar doctrines. They would denounce as heretics anyone who would tamper with these fundamental doctrines—as Origen, the father of amillenarianism, most certainly did. Conservative amillenarians would, however, feel perfectly justified in proceeding to spiritualize passages speaking of a future righteous government on earth, of Israel’s regathering to Palestine, and of Christ reigning literally upon the earth for a thousand years. Their justification is that these doctrines are absurd and impossible and that therefore they must be spiritualized. The wish is father of the interpretation, therefore, and amillennial interpretation of Scripture abundantly illustrates this.
-You can read the whole journal article at http://walvoord.com/article/150