The responsibility of the media (whether television, radio, print or digital media) is very high in an environment like the current one in Spain.
Launching a series is an opportunity to invite people in and to invite people back in who might have drifted from regular attendance.
I have friends that preach through a Bible book over the course of many months. It seems to work for their churches. I tend to think that there are advantages to shorter series.
1. Shorter series mean more launch points – if you only start a new series every six months then you only get that launch point twice each year. If you start a new series every 4-8 weeks then you might have 6-8 launch points per year. Launching a series is an opportunity to invite people in and to invite people back in who might have drifted from regular attendance.
2. Shorter series naturally allow more schedule flexibility – that is, you can juggle the series to fit the calendar. So you can do a year-starter leadership series, and then something else before a pre-Easter series. Shorter series’ also means potentially more “buffer weeks” where there is some wiggle room for when you need to make changes to the schedule.
3. Shorter series avoid monotony – you have to be an amazing preacher to keep people engaged in a six month series in Jeremiah. You are not Martyn Lloyd-Jones and nor am I. Both preacher and listener benefit from not getting to the point where a series starts to drag.
4. Shorter series avoid genre overload – some people love Proverbs, others thrive on Psalms, some respond well to historical narratives, others eat up the epistles. Multiple shorter series allow for a schedule that resonates with more people. Even the most ardent prophecy fan will appreciate some weeks in another part of the Bible.