The best book on Assurance was written by one called "John," at the back part of the Bible. He wrote an epistle on this subject. Sometimes you just get a word that will be a sort of key to the epistle, and which unfolds it. Now if you turn to John 20:31, you will find it says, "These are written, that ye might believe that Jesus is the Christ, the Son of God; and that, believing, ye might have life through His name." Then if you turn to 1 John 5:13, you will read thus: "These things have I written unto you that believe on the name of the Son of God; that ye may _know_ that ye have eternal life; and that ye may believe on the name of the Son of God." That whole epistle is written on assurance. I have no doubt John had found some people who questioned about assurance and doubted whether they were saved or not, and he took up his pen and said, "I will settle that question;" and he wrote that last verse in the twentieth chapter of his gospel. I have heard some people say that it was not their privilege to know that they were saved; they had heard the minister say that no one could know whether they were saved or not; and they took what the minister said, instead of what the Word of God said. Others read the Bible to make it fit in and prove their favorite creed or notions; and if it does not do so, they will not read it. It has been well said that we must not read the Bible by the blue light of Presbyterianism; nor by the red light of Methodism; nor by the violet light of Episcopalianism; but by the light of the Spirit of God. If you will take up your Bible and study "assurance" for a week, you will soon see it is your privilege to know that you are a child of God.