 The Key thing that we need to keep in Mind is that God has always used men to communicate to other men about Himself . And a man`s Ministry may only reflect a single facet of the Great God of the Universe . 
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When we read the literal Words of the Bible we have to keep in Mind time and situation as well as the writer`s Perspective on why God said what He said and did what He did.
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If you look at any man`s life and ministry ( except for Christ Jesus ) you get a skewed Perspective on God regardless of how `righteous` they may appear.  This is because of their personal experiences, their biases, their revelation and the limitations of the human brain.
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The term `rightly dividing the Word of Truth ` has been around a long time . It is a way of addressing the apparent Changes in God`s Purpose and Attitude from Dispensation to Dispensation and Covenant to Covenant . 
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A casual reader of the Bible , especially the Old Testament, will not get the correct view of God . 
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As a matter of Fact , Christ Himself made this statement: <br>
<i> On these two Commandments ( Love ) hang all the Law and the Prophets </i>. Mat 22:40 
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He was saying that God has always been Love and always will be.; that everything that the Law and Prophets said must be interpreted from that correct Perspective of God regardless of the precise wording and Tone of the Scriptures .
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The major theological conflicts between Christians derive from the differences in their overarching concepts of the Nature of God .
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The HolySpirit , who is God , only operates perfectly through a person when they are motivated by Love (sounding brass...). Has God changed? No!
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We get only a few explicit glimpses into the Love Nature of God in the Old Testament with the exception of Psalms .
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Why is this? The men whom God used in the Old Testament operated primarily by Command rather than Love . They rarely provided an explanation of the Law or God`s rationale for saying what He said or doing what He did.
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Why? Because they did not really Know God . They had a limited view and Understanding of God and worshipped Him in Fear by command.
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This is major! It is the difference between a Son and a Servant . The Son Knows and Loves the Father while the Servant may simply just Obey Him.
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The Servant Fears God because of the Consequences of disobedience . The Son`s Fear of God is actually Respect , admiration, Honour and Love .
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 Jesus said: <br>
<i> Search the scriptures; for in them ye Think ye have Eternal Life : and they are they which Testify of Me. </i> Joh 5:39 .
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He was saying that the Truth about Himself was not obvious in the Scriptures ; that you have to search through them to find those that ~ Testify ~ of Him (the True and Living God ); and that <b>only</b> those Scriptures generate Thoughts which produce Eternal Life !
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That is an amazing statement! Jesus was not undermining the Scriptures but clarifying how they should be used.
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In the same way we must Understand time and situation with respect to Jesus` own Words . He was an Old Testament Prophet , the sacrificial Lamb and King of Kings and Lord of Lords at various points in His Life .
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This is why the Revelation of the Gospel of Jesus Christ came through the Apostles by the HolySpirit who did not serve multiple roles as Jesus did.
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Yes, all the Scriptures are Inspired - motivated by the HolySpirit . But we must read them from the Perspective of the Truth or we will get confused about God for the reasons stated above.
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The Truth is that God is Love and He proved it 1) in Christ Jesus` Sacrifice and 2) the Gift of Eternal Life and 3) Relationship with Him through His indwelling HolySpirit !
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Any lesser Perspective on God drives us toward Legalism , away from Grace , and kills Faith leaving us insecure and unproductive - without the Fruit and Gifts of the HolySpirit .
