Sometimes when out and about I am offered a lunch which consists of sandwiches, savouries, and (on a good day for taste but bad day for waist) cakes. Normally I munch my way through sufficient to feel full. But I have noticed I do not always feel satisfied. At least not in comparison to a roast dinner with trimmings and pudding to follow.
Sermons are like that too. Some are filled with bits and pieces: thoughts, observations, even occasional references to the text of the readings! Like a sandwiches and savouries lunch they fill up but do not satisfy. Others lead to satisfaction like a roast dinner. The secret? I suggest it is the preacher sticking to the text, digging deep into its meaning for today, and offering up the learnings from the deeper dig. Preferably this is not the regurgitation of an encyclopaedia article but allowing the text to speak for itself. People do not live by bread alone but by every word which comes out of the mouth of God.