If a preacher preaches 52 sermons a year, at 20 minutes per sermon, that means that the preacher is preaching to his congregation for 17 hours and 20 minutes a year. Over the course of the three year lectionary, that's 52 solid hours of preaching.
If I preach for 15 minutes, I hear about the "long" sermon when I get home.
In the course of 156 sermons, doesn't a preacher have to pick and choose (guided by the Holy Spirit and constrained to some degree by the lectionary) which aspects of the Gospel or which aspects of the Law he is going to concentrate on for each particular sermon?
Absolutely. In the method of Bible study that I use, it includes these three related questions (and sub-questions) about the text:
1. How does it understand my/our plight? What's the "bad news" it is addressing?a. What human failure or sin does it expose?
b. How does the word pulverize me/us?
c. What aspect of my/our lost condition does it speak to? e.g. bondage, sin, guilt, alienation, weakness, darkness, etc.
2. How is that plight resolved? What's the "good news" in this situation?a. What hope does it give in my/our lost condition?
b. How does it heal and make whole? e.g. liberation, cleansing, forgiveness, reconciliation, power, enlightenment, etc.
3. How is Jesus involved in affecting the resolution?a. How is this solution unique to Christians?
b. Where in my/our life/lives does Jesus meet me/us?
Over the course of 156 sermons, isn't it proper to have some of them that place more emphasis on points of The Law and others that emphasize aspects of the Gospel, with the understanding that a preacher can't cram everything in every sermon every Sunday, but over the course of time everything that needs to be covered gets covered?
A sermon without the Gospel is not a Christian sermon. It may be wise advice. It may be good psychology. It may even be a wonderful exposition on the first use of the law -- but such preaching doesn't bring salvation to anyone. We
must talk about what God does for us sinful, broken, guilty, people in our sermons or we nullify Jesus' painful death.
As others have pointed out, there are times when events in the news raises issues that should be addressed in sermons. When the issue of whether or not the family should pull the plug on Terry Schiavo was in the news, I strayed from the lectionary to preach about Solomon praying for wisdom, and about the importance of seeking the guidance of the Holy Sprit when faced with a difficult decision. I don't see a problem with focusing on that one narrow topic within the broader range of the entire Bible because it was something that was on peoples' minds at the time.
Certainly -- and the same questions can be asked of contemporary events: What aspect of our sinful plight does it expose? How does God overcome that plight? How is Jesus involved in the resolution? In fact, the next question (and sub-questions) in the method is:
4. What in our world functions in the same way?a. How has the biblical story been re-enacted in my life or in the life of someone I know?
b. What metaphors, images, stories does the text produce?
If the message of the biblical story is true, we should see evidence of that in people's lives today.
I'm not advocating preachers turning first to the news to determine what to preach about. But sometimes that seems like it is the right thing to do.
I agree; but whether preaching from a biblical text or from the daily news, the gospel -- what God has done, is doing, and promises to do for us sinners --
must be part of our proclamation. Otherwise it is not a Christian sermon. We have been called to proclaim the Gospel. We are called "ministers of the Gospel". Without the Gospel we become just another self-help guru.