Another example of metaphor would be ‘the buildings’, we use to associate the image of opening a new door as reaching for a new goal. King used the ‘doors of opportunity’ and ‘warm threshold’ as a way to describe the works that need to be taken to impose progress on the civil rights in United States. ‘Now is the time to open the doors of opportunity to all of God’s children’ and ‘But there is something that I must see to my people who stand on the warm threshold which leads into the palace of justice.’ Above all, metaphor helps the reader to create a vivid imagery, can transform emotional effects from something that is generally and common to something that is uncommon and less understood. In another word, it is ‘the intrusion of non-literal