In between Ephesians and Philippians we read two Psalms and two chapters of Isaiah.
Psalm 75, of Asaph. A song of praise to the LORD. The theme is He executes proper judgement. It ends with: “All the horns of the wicked I will also cut off, But the horns of the righteous shall be exalted.”
Psalm 76, of Asaph. A song that praises the LORD, how He confounds the “stouthearted” but saves the meek.
Isaiah 9. A must read chapter of Isaiah. It speaks of “The people that walked in darkness have seen a great light: they that dwell in the land of the shadow of death, upon them hath the light shined.” Then it states: “For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.” It speaks of Christ, the coming Messiah, both his humanity (a child) and his deity (son of God).
Isaiah 10 speaks of the punishment of Syria (and Assyria), then the temnant of Israel shall return.