Study before you preach
Congregations must understand the authority for what we say comes not from our homiletical bag of tools but from Scripture as God’s inspired Word. Good preaching may be defined in many ways, but one thing is certain: There is no good preaching apart from good interpretation.
Haddon W. Robinson and Craig Brian Larson, The Art and Craft of Biblical Preaching: A Comprehensive Resource for Today’s Communicators, 1st ed. (Grand Rapids, MI: Zondervan Publishing House, 2005), 237.