_nature_ to be self-sufficient and excelling; I supposed not, therefore, that there could be anything beyond nature. “I was now about seventeen: I had dived into the depths of metaphysical calculations. With sophistical arguments had I convinced myself of the non-existence of a First Cause, and, by every combined modification of the essences of matter, had I apparently proved that no existences could possibly be, unseen by human vision. I had lived, hitherto, completely for myself; I cared not for others; and, had the hand of fate swept from the list of the living every one of my youthful associates, I should have remained immoved and fearless. I had not a friend in the world;--I cared for nothing but _self_. Being fond of calculating the effects of poison, I essayed one, which I had composed, upon a youth who had offended me; he lingered a month, and then expired in agonies the most terrific. It was returning from his funeral, which all the students of the college where I received my education (Salamanca) had attended, that a train of the strangest thought pressed upon my mind. I feared, more than ever, now, to die; and, although I had no right to form hopes or expectations for longer life than is allotted to the rest of mortals, yet did I think it were possible to protract existence. And why, reasoned I with myself, relapsing into melancholy, why am I to suppose that these muscles or fibres are made of stuff more durable than those of other men? I have no right to suppose otherwise than that, at the end of the time allotted by nature, for the existence of the atoms which compose my being, I must, like all other men, perish, perhaps everlastingly. Here, in the bitterness of my heart, I cursed that nature and chance which I believed in; and, in a paroxysmal frenzy of contending passions, cast myself, in desperation, at the foot of a lofty ash-tree, which reared its fantastic form over a torrent which dashed below.