For with what confidence can I venture upon such bold enterprises, when, beside those numberless infirmities peculiar to myself, I find so many which are common to human nature? Can I be sure that, in leaving all established opinions, I am following truth? and by what criterion shall I distinguish her, even if fortune should at last guide me on her footsteps? After the most accurate and exact of my reasonings, I can give no reason why I should assent to it, and feel nothing but a _strong_ propensity to consider objects _strongly_ in that view under which they appear to me.[101:1] Occasionally, seduced by some impulse of playful candour, we find him giving us admission as it were into the chamber of his thoughts, and desiring that some one would drag him into the common circle of the world. When there, he consents for a short time to comport himself as a man, is social and sympathetic with his kind, and pleased with what is passing around; when anon the ambition which had prompted his solitary musings stirs his soul, tells him that in active life and the world at large, the sphere of his true greatness is not placed, and prompts him to reimprison himself, and pursue the great aim of his existence. But what have I here said, that reflections very refined and metaphysical have little or no influence upon us? This opinion I can scarce forbear retracting, and condemning from my present feeling and experience. The _intense_ view of these manifold contradictions and imperfections in human reason has so wrought upon me, and heated my brain, that I am ready to reject all belief and reasoning, and can look upon no opinion even as more probable or likely than another. Where am I, or what? From what causes do I derive my existence, and to what condition shall I return? Whose favour shall I court, and whose anger must I dread? What beings surround me? and on whom have I any influence, or who have any influence on me? I am confounded with all these questions, and begin to fancy myself in the most deplorable condition imaginable, environed with the deepest darkness, and utterly deprived of the use of every member and faculty. Most fortunately it happens, that since Reason is incapable of dispelling these clouds, Nature herself suffices to that purpose, and cures me of this philosophical melancholy and delirium, either by relaxing this bent of mind, or by some avocation, and lively impression of my senses, which obliterate all these chimeras. I dine, I play a game of backgammon, I converse, and am merry with my friends; and when, after three or four hours' amusement, I would return to these speculations, they appear so cold, and strained, and ridiculous, that I cannot find in my heart to enter into them any farther.