Contradiction with Isaiah 8:14
Isaiah 8:6 mentions rejoicing in Rezin and Remaliah's son, while Isaiah 8:14 depicts the Lord as a stone of stumbling, implying a contrast in sources of security.
Isaiah 8:14: And he shall be for a sanctuary; but for a stone of stumbling and for a rock of offence to both the houses of Israel, for a gin and for a snare to the inhabitants of Jerusalem.
Contradiction with Isaiah 7:7
Isaiah 8:6 discusses reliance on political leaders, whereas Isaiah 7:7 assures that the plans of such leaders will not stand, showing a contradiction in the stability and power of such political alliances.
Isaiah 7:7: Thus saith the Lord GOD, It shall not stand, neither shall it come to pass.
Contradiction with Isaiah 30:1
Isaiah 8:6 shows confidence in earthly alliances, while Isaiah 30:1 condemns them, highlighting disobedience in seeking counsel not of God.
Isaiah 30:1: Woe to the rebellious children, saith the LORD, that take counsel, but not of me; and that cover with a covering, but not of my spirit, that they may add sin to sin: