T.F. Torrance aims in this book to discover how and why there came about in the early history of the Christian Church the enormous difference that exists between the faith of the New Testament and that of the second and third centuries. He explores how the concept of grace is distinctively characteristic of every doctrine of the New Testament, and yet at the same time is the most sensitive to change.

T.F. Torrance aims in this book to discover how and why there came about in the early history of the Christian Church the enormous difference that exists between the faith of the New Testament and that of the second and third centuries. He explores how the concept of grace is distinctively characteristic of every doctrine of the New Testament, and yet at the same time is the most sensitive to change.

Augustine, the man with upturned eye, with pen in the left hand, and a burning heart in the right (as he is usually represented), is a philosophical and theological genius of the first order, towering like a pyramid above his age, and looking down commandingly upon succeeding centuries. He had a mind uncommonly fertile and deep, bold and soaring; and with it, what is better, a heart full of Christian love and humility. He stands of right by the side of the greatest philosophers of antiquity and of modern times. We meet him alike on the broad highways and the narrow footpaths, on the giddy Alpine heights and in the awful depths of speculation, wherever philosophical thinkers before him or after him have trod. As a theologian he is facile princeps, at least surpassed by no church father, schoolman, or reformer. With royal munificence he scattered ideas in passing, which have set in mighty motion other lands and later times. He combined the creative power of Tertullian with the churchly spirit of Cyprian, the speculative intellect of the Greek church with the practical tact of the Latin. He was a Christian philosopher and a philosophical theologian to the full.

James Buchanan (1804–1870) was a Scottish minister and theologian. He joined the Free Church of Scotland in 1843, and succeeded Thomas Chalmers as professor of systematic theology at the New College of the Free Church in Edinburgh in 1847, a post he held for twenty-one years. Buchanan's magnum opus was The Doctrine of Justification, which still has great value as a classic treatment of the article by which Martin Luther says the church stands or falls. He covers biblical, systematic, and historical ground in his work, but is never far from a warm-hearted evangelical delight in the doctrines he is expounding.