David Jackman's in depth knowledge of the whole Bible is clear when one reads this book on John's letters.Two of the letters we are told, were no more than one page long, yet there is so much held within them which is vital to our understanding of what is happening in the world today with regard to the work of the devil. It has always been thus, and John shows the path for us to take in order to live within the Grace of God and how to understand the real truth of the love of God and how we can grow in faith and love against the evil one.A compelling read based on David Jackman's deep knowledge of his subject. I have had the great privilege of hearing him preach. His clarity of mind and ability to put across the truth of the Bible in its entirety is simply astonishing. But this clarity comes from a deep love for God and faith in our Lord Jesus Christ the Son of God coupled with the importance of The Holy Spirit within us as a result of being true Christians.A must have and read again and again book which explains so much with clarity of mind born from great knowledge of the Bible as a whole and its truth of meaning to us all based on facts which cover a period of more than five thousand years to the present day. Extraordinary!