A scene of Revival

I have been reading back over some of Christ in the Camp by John William Jones about the Revival in the Army of Northern Virginia. I came across a letter written by Rev. Dr. Wm. J. Hoge that described his experiences of the Lord's work around Fredericksburg. This quote is long, but I didn't put the whole letter here just part. Rev. Hoge writes:

"In my last visit, it was my high privilege to preach six times to crowds of men eager to hear the Gospel. Five of these sermons were to the Stonewall Brigade; the first, Saturday night. The camp was muddy, the air harsh, the night dark- just the night to chill the preacher with forebodings of empty seats and cheerless services. But as I made my way through the streets of the tented city to the substantial church erected by this enterprising brigade, I was suddenly greeted by a burst of sacred song which lifted my heart. It sounded over the camp like a bell. A prayer-meeting had been appointed for the half hour before public worship, and the house was already full: so full that its was not without difficulty that I made my way to the pulpit; so full that when General Jackson and General Paxton came to the door, they modestly retired, least they should displace some already within; so full that one of the men aptly compared the close packing to that of 'herrings in a barrel.'
One could not sit in that pulpit and meet the concentrated gaze of those men, without deep emotion. I remembered that they were veterans of many a bloody field. The eyes which looked into mine, waiting for the Gospel of peace, had looked as steadfastly into eyes which burned with deadly hate, and upon whatever is terrible in war. The voices which now poured out their strength in singing the songs of 'Zion' had shouted in the charge and the victory. I thought of their privations and their perils, of the cause for which they had suffered, of the service they had rendered the country, the Church of God, and whatever I hold personally dear, and what could I do but honor them, lobe them, and count it all joy to serve them in the Gospel?
I missed, indeed, some faces which would have beamed their welcome upon me; some voices with which, in other days, mine had joined in family worship and 'in the great congregation.' But I remembered how they lived, how they fought, how they died- in faith, the blessed faith of Christ; that 'all the ends they aimed at were their country's, their God's, and truth's, and that they are now enrolled in 'the noble army of martyrs.' I remembered, too, with just gratification, that their rallying, charging and dying at the very crisis of our fate, at Manassas, contributed not a little towards earning for their brigade its immortal name, 'Stonewall'.
While we were singing, one thought frequently came to me: If such meetings were common throughout the army, what a school of sacred music it would be! Surely men thus trained, returning to their homes, would break up that slothful and wicked habit, so prevalent in our Churches, of the men remaining stupidly mute while God's praises are sung.
While preaching to these men, their earnestness of aspect constantly impressed me; the absence of that rather comfortable and well-satisfied air which often pervades our congregations, as if mere custom or prospect of entertainment had assembled us. These men looked as if they had come on business, and a very important business; and the preacher could scarcely do otherwise than feel that he too, had business of moment there!"