God: "I looked for someone to take a stand for me, and stand in the gap" (Ezekiel 22:30)
God altereth not His plans; why should He? He is Almighty, and therefore can perform His pleasure. Why should He? He is the All-wise, and therefore cannot have planned wrongly. Why should He? He is the everlasting God, and therefore cannot die before His plan is accomplished. Why should He change? Ye worthless atoms of earth, ephemera of a day, ye creeping insects upon this bay-leaf of existence, ye may change your plans, but He shall never, never change His.
Since expository preaching begins with the text of Scripture, it starts with God and is in itself an act of worship, for it is a declaration of the mighty acts of God. It establishes the focus of the people upon God and His glory before any consideration of man and his need.