And many other signs truly did Jesus in the presence of his disciples, which are not written in this book: but 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.
John 20:30-31

John loved  the Lord Jesus. He believed the words Jesus spoke, the life He lived, and he believed in the death of Jesus, His burial, and in His resurrection. After the empty tomb was discovered by Mary Magdalene and the others that were with her, Peter and John raced to the tomb, where John beat Peter to the empty grave John stopped, and Peter went on in, finding the head covering wrapped in a place alone, but the linen burial clothes were like the body of Jesus disappeared within them.

John notes that many other signs and miracles were done by Jesus before His death, but they are not all written in this book. This book is written so that in the reading of it that the reader would believe that Jesus is the Christ, the Son of God. All four of the Gospel accounts -Matthew, Mark, Luke,  and John – show His Deity, but none so clearly and powerfully as John.

This is the first one of the Gospels I suggest that a new believer read, study and hear. Do not begin in the Old Testament you will get bogged down, and lose interest. Read John’s Gospel account, and then read First, Second, and Third John. Then you can read the other three Gospel accounts, and the other New  Testament book of Acts, all the other Letters [Epistles], and the Revelation. Just a suggestion,  but whatever you do if you are new to the faith of Christ Jesus, read the word so you will be empowered and led by the Spirit of God. After this you can read the Old Testament,  and be greatly blessed reading Genesis through Malachi.

These words of John were written so that those who believe will have eternal life. Life in and through the Lord Jesus begins the moment you believe Him. Believe Him, and you will live forever with Him.