I tend to view scripture through the lens of resonance. The longer the passage has survived, and the more people who venerate it, the more resonance it has. Regardless of source (pedo prophet, scammy leader, schizo, whatever).

From a functional perspective, reciting prayers that have withstood the test of time, especially using older linguistic forms, tends to produce results. By results, I mean altered mental states, that when repeated over time have demonstrable effects in ones life. I am a loving spouse, a compassionate and effective manager, and revered within my technical discipline, precisely because of the seriousness to which I apply meditation, prayer, etc. Most importantly, I am closer to that Kingdom of Heaven we talked about in another thread. Could I have achieved all these things without meditation, prayer, etc.? Maybe. But it wasn't until I took these disciplines seriously that I started to see concrete results in my life.

This isn't the result of God rewarding you with grace, siddhis or whatever, it's just a natural result of resonating at a frequency that permits these changes.