That which was from the beginning, that which we have heard, that which we have seen with our eyes, that which we saw, and our hands touched, concerning the Word of life
Which we have heard - John was with the Saviour through the whole of his ministry, and he has recorded more that the Saviour said than either of the other evangelists. It is on what he said of himself that he grounds much of the evidence that he was the Son of God.