"This 'Complete Armour' is beyond all others a preacher's book: I should think that more discourses have been suggested by it than by any other uninspired volume. I have often resorted to it when my own fire has been burning low, and I have seldom failed to find a glowing coal upon Gurnall's hearth. John Newton said that if he might read only one book beside the Bible, he would choose 'The Christian in Complete Armour', and Richard Cecil was of much the same opinion. J.C. Ryle has said of it, 'You will often find in a line and a half some great truth, put so concisely, and yet so fully, that you really marvel how so much thought could be got into so few words'. --(C. H. Spurgeon)--

"The subject of the treatise is solemn; A War between the Saint and Satan, and that so bloody a one, that the cruellest which was ever fought by men will be found but sport and child's play to this. It is a spiritual war that you shall read of; and that not a history of what was fought many ages past and is now over, but of what is now doing—the tragedy is at present acting—and that not at the furthest end of the world, but what concerns thee and everyone that reads it. The stage whereon this war is fought is every man's own soul. Here is no neuter in this war. The whole world is engaged in the quarrel, either for God against Satan, or for Satan against God." --(William Gurnall)--