_The source of man's unhappiness is his ignorance of Nature. The pertinacity with which he clings to blind opinions imbibed in his infancy, which interweave themselves with his existence, the consequent prejudice that warps his mind, that prevents its expansion, that renders him the slave of fiction, appears to doom him to continual error. He resembles a child destitute of experience, full of ideal notions: a dangerous leaven mixes itself with all his knowledge: it is of necessity obscure, it is vacillating and false:--He takes the tone of his ideas on the authority of others, who are themselves in error, or else have an interest in deceiving him. To remove this Cimmerian darkness, these barriers to the improvement of his condition; to disentangle him from the clouds of error that envelope him; to guide him out of this Cretan labyrinth, requires the clue of Ariadne, with all the love she could bestow on Theseus. It exacts more than common exertion; it needs a most determined, a most undaunted courage--it is never effected but by a persevering resolution to act, to think for himself; to examine with rigour and impartiality the opinions he has adopted. He will find that the most noxious weeds have sprung up beside beautiful flowers; entwined themselves around their stems, overshadowed them with an exuberance of foliage, choaked the ground, enfeebled their growth, diminished their petals; dimmed the brilliancy of their colours; that deceived by their apparent freshness of their verdure, by the rapidity of their exfoliation, he has given them cultivation, watered them, nurtured them, when he ought to have plucked out their very roots. Man seeks to range out of his sphere: notwithstanding the reiterated checks his ambitious folly experiences, he still attempts the impossible; strives to carry his researches beyond the visible world; and hunts out misery in imaginary regions. He would be a metaphysician before he has become a practical philosopher. He quits the contemplation of realities to meditate on chimeras. He neglects experience to feed on conjecture, to indulge in hypothesis. He dares not cultivate his reason, because from his earliest days he has been taught to consider it criminal. He pretends to know his date in the indistinct abodes of another life, before he has considered of the means by which he is to render himself happy in the world he inhabits: in short, man disdains the study of Nature, except it be partially: he pursues phantoms that resemble an _ignis-fatuus_, which at once dazzle, bewilders, and affright: like the benighted traveller led astray by these deceptive exhalations of a swampy soil, he frequently quits the plain, the simple road of truth, by pursuing of which, he can alone ever reasonably hope to reach the goal of happiness.