Does consciousness prove an afterlife?

Opium was a narcotic I am just recovering from along with an earthy characteristic I used to have—that of indolence. I will answer questions from experience and not as one greatly learned. 

When you passed over, how long was it before you took notice of things?

Nearly five years. Did you sleep all that time? A trancelike condition. When you awoke fully, did you see anyone you knew? Harriet, Hogg, Dorothy, your mother, Shelley, and a note from Byron who was in the valley. 

—Samuel Coleridge