I concur that both preaching and teaching should appeal to the total man. The 19th century evangelist, Charles Finney, embraced the view that preaching is an appeal, not just to the heart, but also to the emotions. Finney, with his anxious bench and salesman like approach to preaching, was highly successful at getting people to make positive decisions for the Gospel. He was so successful that his methodology was adopted by broad evangelicalism and became the most popular form of evangelism in the 20th century, albeit in varied forms. But Finney's methodology has been fraught with serious problems, most notably is the prolific recidivism rate among professors. Finney was aware of this but just couldn't conceive of any solution to the problem the required him to change his entire approach to evangelism.
Finney's failure was that he did not teach the Word of God. He preyed on the emotions, in order to change thinking, in order to arrive at a desired conclusion. That was the reason why so many people would make their decision for Christ and be like the seed that landed on rocky ground. Finney believed in the shotgun approach. Even if scores were never truly converted, some were, so the ends justified the means. Sadly, Finney's error could have be averted through sound preaching and teaching of the Word of God.
The truth is that preaching is not an all or nothing proposition; whether it is a Sunday morning sermon or an evangelistic message. Proper preaching includes teaching. In fact you cannot preach without teaching. Preaching, as we commonly use the term, is not always resident in teaching; but that is because we don't understand what preaching is. When Paul told Timothy to "preach the word" (κήρυξον τὸν λόγον, 2 Timothy 4:2), he was literally telling him to proclaim the word. This is done whenever the Word of God is taught. We are proclaiming, or putting forth, the Word; whether it is in the form of a sermon or a bible study. Modern Christianity confuses preaching with a sermon only. Sermons and bible studies are just different sides of proclaiming the Word. Sermons doesn't allow for audience participation whereas bible studies often do.
If teaching is equal to preaching (proclaiming), then the proper approach is to appeal to the whole person. The person doing the proclaiming does not effect change in the mind of the person receiving the message. That is the pervue of the Holy Spirit alone. So, we should take seriously the handling of the Word of God and keep James' admonition to heart:
James 3:1 Let not many of you become teachers, my brethren, knowing that as such we will incur a stricter judgment.
