Final answer:
In the line, 'The world will little note, nor long remember, what we say here,' President Lincoln indicates that the world will not pay much attention to and remember what is said during the dedication. However, he emphasizes the duty of the living to continue to be dedicated to the cause for which the soldiers died.
Step-by-step explanation:
In the line, 'The world will little note, nor long remember, what we say here,' President Lincoln clearly states that the world will not pay much attention to and remember what is said during the dedication. However, he follows it up by saying that 'It is for us the living... to be here dedicated to the great task remaining before us.' This indicates that it is the duty of the living to continue to be dedicated to the cause for which the soldiers died, and to ensure that their sacrifices were not in vain.