The third one because you don’t need a comma when using and
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.
Thoreau mostly uses imagery to illustrate time in the excerpt. The second sentence is saying that he is in the midst of time/living, and he can "detect how shallow it is," meaning that he is aware that life is short and that the end is inevitable. Thoreau also describes time as being fleeting, but ever-present.
I hope this helps!
I saw my friend henry walking to the store last Friday night. It was a rainy stormy night. Lighting stretching across the sky like a cat before it lies on its bed. All I heard was a "BOOM" and the next thing I saw was the store catch on fire. I ran at the speed of a cheetah into the building to see if anyone was inside. I found the store owner and dragged him out of the burning store like a drag of a baseball field. I was thanked and appreciated. The next morning I woke up and saw the headlines of the newspaper stating "Local hero saves Shop Owner."
