I'm reading a really good book right now entitled Powerful Evangelism for the Powerless. This book is by a guy named C. John Miller. Everything he has written is great.

A quote about the passion that the leaders of the Great Awakening had for evangelism:

"What we see is that our evangelical ancestors were soldiers, whereas we tend to think and act like civilians. These eighteenth-century evangelists thought deeply about eternal issues, prayed with intense fervor, worked harder than anyone else, and outfought the gin sellers (the eighteenth-century version of crack dealers). They were God's "soul winners," soldiers marching in God's army of love. I doubt very much that it ever occurred to them that "winning souls" might limit divine sovereignty or suggest psychological manipulation. To reach the consciences of his hearers, John Wesley preached in Dublin, Ireland, with an empty coffin at his side. When Whitefield preached to the stubborn miners of Bristol, he wept in prayer with a great outpouring of tears for their lostness. Soon his surging concern broke their hearts and their coal-stained faces were streaked white with their own tears."
Powerful Evangelism for the Powerless, 1980, C. John Miller