True and false worship, God tells His people that they are worshiping Him dishonestly. They make an outward appearance of honoring God, but they are not honoring Him in their hearts. It is all about what they can get for themselves without really loving Him
God’s promise to Abraham was realized through faith. Faith is a BIG deal, and by it we are counted as righteous. The profit Habakkuk said “The Just shall live by faith”
Isaiah points out Israel’s futile idolatry; they have committed abominable atrocities in the worship of their false gods. But God offers a way back and healing for His backsliding people, if they will only return to Him and to His word.
Abraham is our example, for the scriptures say “faith was accounted to Abraham for righteousness”. Rituals and rites will NOT save us; we must stand on this. Christ died for sinners; we cannot by our good works make ourselves right with God.
An invitation is given, an offer is made. Your way has been paid in advance; you just need to take hold of it. In this Old Testament passage, God sends out His invitation to ALL, not just those of Jewish birth.