"Soft preaching makes hard people. Hard preaching makes soft people."
Preaching that is fluff and superficial, heavy on felt needs, but light on the greatest and only eternal need which only the Gospel addresses will produce "hard" people whose hearts are hard and hard to be moved. On the other hand, hard preaching that centers on the glory of God, the gospel of Christ, the doctrines of our faith, that makes people think and challenges them with that greatest need that only the gospel addresses will produce "soft" people whose hearts are soft and who will follow Christ wherever He leads and do whatever He says because He is their treasure.
God, may my preaching be the latter and not the former.