Someone asked a seminary professor how many points a sermon should have?  He answered, “At least one!”

How long should a sermon be?  Two hundred years ago, the average sermon was much longer than the average sermon of today.  An older preacher told me years ago, “Watch your congregation and make sure you finish before they do.”  It is entirely possible to have great material, yet lose the attention of your audience because it was too much for one sitting.  There are times when the Holy Spirit will direct a service in such a way that it will go longer than normal.   I have experienced services that lasted several hours, but not very many.  Most people feel far more friendly toward two shorter sermons, than they do one very long sermon.