Contradiction with Matthew 7:13
While Isaiah 26:2 speaks of opening the gates for a righteous nation, Matthew 7:13 presents the idea of a narrow gate that few find, suggesting exclusivity rather than openness.
Matthew 7:13: Enter ye in at the strait gate: for wide [is] the gate, and broad [is] the way, that leadeth to destruction, and many there be which go in thereat: [strait: or, narrow]
Contradiction with Revelation 21:27
Isaiah 26:2 discusses opening the gates, whereas Revelation 21:27 indicates that nothing impure will enter the city, implying a closed gate to those not pure.
Revelation 21:27: And there shall in no wise enter into it any thing that defileth, neither [whatsoever] worketh abomination, or [maketh] a lie: but they which are written in the Lamb's book of life.
Contradiction with Psalm 24:7
Isaiah 26:2 encourages opening the gates for a righteous nation, but Psalm 24:7 speaks of the everlasting doors, suggesting gates that are more symbolic of divine openings rather than for a specific nation.
Psalm 24:7: Lift up your heads, O ye gates; and be ye lift up, ye everlasting doors; and the King of glory shall come in.
Contradiction with Isaiah 60:11
Isaiah 26:2 mentions opening the gates for the righteous, while Isaiah 60:11 talks about gates being open continually, lacking the condition of righteousness.
Isaiah 60:11: Therefore thy gates shall be open continually; they shall not be shut day nor night; that [men] may bring unto thee the forces of the Gentiles, and [that] their kings [may be] brought. [forces: or, wealth]
Contradiction with Revelation 22:14
This verse contradicts Isaiah 26:2 by emphasizing blessedness for those who follow commandments having right to the tree of life, indicating a more restricted access than nation-based righteousness.
Revelation 22:14: Blessed [are] they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.