The answer is "He's sane."
"True - nervous - very, very dreadfully nervous had I been and am; but why will you say that I am mad? The disease had sharpened my senses not destroyed not build them. Above all was the sense of hearing acute. I heard all things in the heaven and the earth I heard many things in hell. How, then, am I mad? Harken! and observe how healthily - how calmly I can tell you the whole story."
Although he is mentally ill, he claims to be sane.
The major assumption in the first sentence in the Declaration of Independence was the "all men were created equal".
This obviously wasn't the case because slavery was still in full swing; therefore, what was meant by it is that all WHITE men were created equal.
