Discerning the message is hearing from God the prophetic emphasis for the message that you will preach.
Your objective in prayer is to hear from God what He wants you to emphasize with those you are speaking to.
Summarize the main point that the Biblical writer is making in the text.
List some themes, subjects or elements which God may want you to emphasize from the passage.
Select one main emphasis as God speaks to you.
Modify the wording to best articulate and capture the emphasis that God has given to you.
Select the final wording for the prophetic emphasis as the title of your message.