If you'd bothered to read the whole thing properly you'd have noticed that the quote is taken from the New American Bible, the introduction to John in particular.
I'm at a loss as to how you can describe the following statement as heresy/atheistic
However, the accuracy of much of the detail of the fourth gospel constitutes a strong argument that the Johannine tradition rests upon the testimony of an eyewitness.
Does that sound like an atheistic statement to you? Calm down and read it more carefully and read the whole thing which you'll find at the link supplied by ConsequentAtheist.