Which rhetorical device does lincoln use in this sentence, and for what purpose? metaphor; shows that the whole is greater than the sum of its parts metaphor; shows that all parts of the whole must be protected simile; shows that the whole is greater than the sum of its parts simile; shows that all parts of the whole must be protected

The rhetorical device that Lincoln use in this sentence is simile and for the purpose that it shows that the whole is greater than the sum of its parts. This is according to his speech at a Cemetery of Gettysburg in 1863. He emphasized that even though there are many who were dead, only the living can continue and remember what both of them did at that time for their country.