'I’d rather talk about the things Jesus talked about rather than the things he never talked about,' Eichhorn said." (read here)
So only the things Jesus said are important enough to warrant our thoughts, comments and preaching Rev. Eichhorn? Didn't God inspire all of scripture? If God inspired the writings of Peter (and all the writings of scripture), that means Peter wrote what God wanted him to write. What Peter (and all the Biblical authors) wrote is just as important as what Jesus said, because they all come from God.
Pastor Eichhorn may be interested in talking about this quote from Jesus, Matt. 5:17,18 - (Jesus said) "Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished."
So Pastor Eichhorn, if you are only interested in talking about in the things Jesus cared about maybe you should do an in-depth study on Jesus' view of scripture. This article is a good place to start - Jesus and the Inspiration of Scripture.