For my first 15 1/2 years at Quaker meeting, I endeavored mightily in silent worship to suck the incessant internal chatter out of my head in order to create that perfect "vacuum" that God, presumably, was eagerly waiting to fill. I tried all the usual techniques - mantras, short prayers, visualizations (candles, light, waterfalls), stern imprecations ("Shut up, brain!"), pep talks, etc etc etc. Needless to say, very little of this was particularly effective. The howler monkeys in my…