Here's the impact a private moment in World War II had on a young Frenchman watching soldiers worshipping in the heat of the post-D-Day fight through France. It's a reminder our deepest impact almost always occurs when we think no one's paying attention, and when we're in the most intimate moments with God:

"It was a beautiful sunny afternoon in the hollow of a meadow where the men had built an altar with boxes of wood covered with a white cloth. They gathered, once knee on the ground, praying. I was impressed by the spectacle of them, bare-headed, arms and helmets at their feet, praying fervently in the silence of the country only broken by the distant sound of the guns, responding in their language to the solemn invocations of the chaplain/priest. This mass, under the circumstances---out of danger temporarily as we seemed---reaffirmed again my religious convictions.

That a people strong, generous, young, should send their sons so far to fight against oppression, victorious already after so many battles since North Africa, slowly climbing through Italy, inexorably approaching the heart of Nazi Germany---that these sons present here on their knees, in all humility before their Creator, our God, continued their battle, once this moment of spiritual release ended, moved me profoundly, and one could only render glory and grace to this God. This I did in joining in the common prayer."

--recorded by Henri Siaud in "The Links of the Chain" and quoted in "Unknown Soldiers" by Joseph Garland.