Read it through once

And then my mind made its first earnest effort to comprehend what had been infused into it concerning heaven and hell; and for the first time it recoiled, baffled; and for the first time glancing behind, on each side, and before it, it saw all round an unfathomed gulf: it felt the one point where it stood—the present; all the rest was formless cloud and vacant depth; and it shuddered at the thought of tottering, and plunging amid that chaos. While pondering this new idea, I heard the front door open; Mr. Bates came out, and with him was a nurse. After she had seen him mount his horse and depart, she was about to close the door, but I ran up to her.