Characters
Blessed be the Lord my strength, which teacheth my hands to war, and my fingers to fight.
— Pvt. Daniel Jackson • Saving Private Ryan

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The prayer credits the Lord with both strength and the ability to fight. Naming hands and fingers makes that reliance bodily and specific. Praise is directed toward a divine source of martial skill, rather than the speaker claiming to possess that power entirely independently.
Context reviewed