PREFACE The purpose of this study is to enable each student to have a better understanding of the truth of God which will not only make him free from sin, but will be useful to him in leading others to the knowledge of the truth. There is a need for such a comparative study of truth and error, since so many people are unable to recognize the difference. Even among members of the church many do not have a clear concept of the difference between denominational error and New Testament truth. Books have been written - showing the difference between the church of the Lord and churches of men, but to my knowledge there has not been a workbook published on this subject. This is not intended to be an exhaustive study of all denominational errors, but simply a study of some of the more prominent ones which the average Christian worker will meet in his efforts to "preach the gospel to every creature." May we not enter into this study with an air of self-righteousness, but with humble gratitude to God for His mercy and a desire in our hearts to "be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear." (1 Pet. 3:15.) It would be impossible for me to give proper credit to everyone from whom I have received help in preparing these lessons, but to each one I am thankful and deeply indebted. My hope is that each student will learn more of the truth, teach others what he learns and appreciate more and more what God has done to enable us to know His will that we might be saved. - Sam Binkley, Jr.