John 20:31

These are written - Those recorded in this gospel.

That ye might believe ... - This is a clue to the design which John had in view in writing this gospel. The whole scope or end of the book is to accomplish two objects:

1. To prove that Jesus was the Messiah; and,
2. That they who looked at the proof might be convinced and have eternal life.

This design is kept in view throughout the book. The miracles, facts, arguments, instructions, and conversations of our Lord all tend to this. This point had not been kept in view so directly by either of the other evangelists, and it was reserved for the last of the apostles to collect those arguments, and make out a connected demonstration that Jesus was the Messiah. If this design of John is kept steadily in view, it will throw much light on the book, and the argument is unanswerable, framed after the strictest rules of reasoning, infinitely beyond the skill of man, and having throughout the clearest evidence of demonstration.