Introduction: 

Injustice is a terrible thing. It hurts like hell. 
But hope can be found in the unlikeliest of places. 

David Pleads for God’s Help (v1-10). 
The Injustice David Faced (v11-18). 
David’s Final Vindication (v19-28). 

Conclusion 

This is how to cope with every kind of injustice in life: 

Pray (v1-3). 
Pray specifically (v4-10). 
Stand firm in your faith (v11-18). 
Resist the Devil (v19-25). 
Find your joy in Jesus! (v26-28) 
If you can get justice (or if you can help others), you should. This is pleasing to God.