Dr. Alexander Whyte (1836-1921) was widely acknowledged to be the greatest Scottish preacher of his day. He was a mighty pulpit orator who thundered against sin, awakening the consciences of his hearers, and then gently leading them to the Savior. He was also a great teacher, who would teach a class of around 500 young men after Sunday night service, instructing them in the way of the Lord more perfectly. In the later part of Dr. Whyte's ministry, one of his pet topics was prayer. Luke 11:1 was a favorite text and was often used in conjunction with another text as the basis for his sermons on this subject. The sermons printed here represent only a few of the many delivered. But each one is deeply instructive, powerful and convicting. From the Preface: Nobody else could have preached these sermons; after much reading and re-reading of them that remains the most vivid impression. There can be few more strongly personal documents in the whole literature of the pulpit. . . . When all is said, there is something here that defies analysis-something titanic, something colossal, which makes ordinary preaching seem to lie a long way below such heights as gave the vision in these words, such forces as shaped their appeal. We are driven back on the mystery of a great soul, dealt with in God's secret ways and given more than the ordinary measure of endowment and grace. His hearers have often wondered at his sustained intensity; as Dr. Joseph Parker once wrote of him: "many would have announced the chaining of Satan for a thousand years with less expenditure of vital force" than Dr. Whyte gave to the mere announcing of a hymn.