I thought you might be encouraged by these thoughts from John Stott in his classic work Between Two Worlds. They come from chapter 12, “The Call to Study”. These quotes highlight the importance of careful, intensive study of the Bible in preparation for the preaching event:
There is a freshness and a vitality about every sermon which is born of study; without study, however, our eyes become glazed, our breath stale and our touch clumsy.
The higher our view of the Bible, the more painstaking and conscientious our study of it should be. If this book is indeed the Word of God, then away with slovenly, slipshod exegesis!