Extract from the Preface to the Second Edition of the First Part

As to this second edition I would mention, that, while in substance it is the same as the first, yet, on account of my increased acquaintance with the English language, many verbal alterations have been made; also several alterations have been made on account of the increased light which the Lord has been pleased to grant me since July, 1937; a few paragraphs have been entirely left out, and a few new paragraphs have been added.