How does lincoln convey the idea that the federal government's position on slavery before the war was reasonable and measured?

"night. no one was praying for the night to pass quickly. the stars were but sparks of the immense conflagration that was consuming us. were this conflagration to be extinguished one day, nothing would be left in the sky but extinct stars and unseeing eyes." explain the images included in the passage. how is the use of the image of night contradictory to how we might expect it to be used