Do preachers over-explain?

From Ginkworld:

As Calvin Miller writes of the preaching of Jesus, “His sermon on the Mount is his only entire sermon mentioned and can be preached in 18 minutes. In an economy of 2,320 words, Jesus spends 348 on such images as wolves, sheep, light, rock, sand, and storms.” Not once, I might add, does he conjugate a Greek verb or mention “soteriology”. Brine and York, noting the Shakespeare/King James connection, point out that the frontispiece of the original edition states, “Appointed to be read in churches.” Not explained, not exegeted, not outlined or underlined, but read. Itís almost as if they believed the words contain the Word, and would do their work on their own. So try something radical: read the Bible. No, you wonít understand it all and youíll want to look some stuff up later, but not until you see what happens. The first time I read Hamletís famous “To be or not to be” soliloquy, I had no idea what a fardle was, but by the time I reached the end, I was a different person.