Though the Bible says that God has chosen to save the world through The foolishness of the message preached, it does not mean He has chosen to save the world through "foolish preaching. For since, in the wisdom of God, the world through wisdom did not know God, it pleased God through the foolishness of the message preached to save those who believe. NKJV (1 Corinthians 1:21)
"The foolishness of the message preached" is not same as "foolish preaching" This book was written to show you the difference between the two and further help you to know how to prepare and preach sound, biblical messages from God's Holy Book.