What does it say?
Psa 108 contains elements of both Psa 57 and Psa 60, also psalms of David. There is no specific occasion given for the setting of this psalm of praise and petition for victory.
Psa 109 is a psalm of David imploring God against his enemies. Psa 110 is another psalm of David, but it is impossible to be fulfilled completely in David. Instead, it is a Messianic Psalm looking for its final fulfillment in Christ.
What does it mean?
Some wonder why the psalmist would combine Psalms 57 and 60 into what we know as Psa 108. But for centuries musicians have cut and pasted their compositions together for specific occasions. Sometimes even today a couple of older songs or hymns are spliced together in a contemporary manner and become something new and fresh.
Psa 109 is quoted in Acts 1:20 and applied to Judas the traitor. This does not mean that the entire psalm is a prophecy of Judas. It means that David has an adversary that acts in a way that is analogous to Judas. Some see this as possibly a reference to the treason of Ahitophel during the rebellion of Absalom. David himself becomes prophetic of Christ when he complains of being attacked without cause. Observe 109:4 for a correct response in the face of hurtful attack.
Psalm 110 is purely Messianic, impossible to complete in the person of David alone. Psa 110:1 is quoted or referred to in Acts 2:34; 1Cor 15:25; Heb 1:13 and 10:13. Psa 110:4 is referenced in Heb 5:6; 7:17and 7:21. It’s impossible to understand what was running through David’s mind as he penned these words, but we do know that they are incomprehensible outside of application to Christ.
How will I respond?
Are there a couple of old thoughts, songs, attitudes or experiences that I can combine into something new and fresh today? Am I still smarting from someone who has hurt or betrayed me? What can I do today in response to what I see in Psalm 109? Is there something in my life that is totally inexplicable outside of Christ in me?