At what point shall we expect the approach of danger? By what means shall we fortify against it? Shall we expect some trans-Atlantic military giant to step the ocean and crush us with a blow? Never! All the armies of Europe, Asia and Africa combined with a Bonaparte at their head and disposing of all the treasure of the earth, our own excepted, could not by force make a track on the Blue Ridge or take a drink from the Ohio in a trial of a thousand years. At what point then is the approach of danger to be expected? I answer, if it ever reach us it must spring up from amongst us. It cannot come from abroad. If destruction be our lot, we ourselves must be its author and finisher. As a nation of free men, we must live through all times, or die by suicide.
- Abraham Lincoln