Contradiction with Romans 3:10
Contradicts by stating that there is none righteous, while Isaiah 62:12 refers to "The Holy People."
Romans 3:10: As it is written, There is none righteous, no, not one:
Contradiction with Matthew 7:21
Suggests not everyone will enter the kingdom of heaven despite Isaiah 62:12 calling them "The Redeemed of the Lord."
Matthew 7:21: Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
Contradiction with Romans 3:23
Implies all have sinned, contrasting with the notion of a people described as the "Holy People" in Isaiah 62:12.
Romans 3:23: For all have sinned, and come short of the glory of God;
Contradiction with Isaiah 64:6
Describes righteousness as filthy rags, conflicting with the idea of a sanctified people in Isaiah 62:12.
Isaiah 64:6: But we are all as an unclean [thing], and all our righteousnesses [are] as filthy rags; and we all do fade as a leaf; and our iniquities, like the wind, have taken us away.
Contradiction with John 9:41
Suggests awareness of sin, implying imperfection, against the "Redeemed" status mentioned in Isaiah 62:12.
John 9:41: Jesus said unto them, If ye were blind, ye should have no sin: but now ye say, We see; therefore your sin remaineth.