But, when we have granted all this, it is however a mistake to say, that these "subtleties of human intellect are of little further use, than to afford an amusement to persons of curious speculation(79)." We have seen, in the case of the doctrine of philosophical necessity(80), that, though it can never form a rule for the intercourse between man and man, it may nevertheless be turned to no mean advantage. It is calculated to inspire us with temperance and toleration. It tends impressively to evince to us, that this scene of things is but like the shadows which pass before us in a magic lanthorn, and that, after all, men are but the tools, not the masters, of their fate. It corrects the illusions of life, much after the same manner as the spectator of a puppet-shew is enlightened, who should be taken within the curtain, and shewn how the wires are pulled by the master, which produce all the turmoil and strife that before riveted our attention. It is good for him who would arrive at all the improvement of which our nature is capable, at one time to take his place among the literal beholders of the drama, and at another to go behind the scenes, and remark the deceptions in their original elements, and the actors in their proper and natural costume. (79) See above, Essay XXII. (80) See above, Essay XII. And, as in the question of the liberty of human actions, so in that of the reality of the material universe, it is a privilege not to be despised, that we are so formed as to be able to dissect the subject that is submitted to our examination, and to strip the elements of which this sublunary scene is composed, of the disguise in which they present themselves to the vulgar spectator. It is little, after all, that we are capable to know; and the man of heroic mind and generous enterprise, will not refuse the discoveries that are placed within his reach. The subtleties of grammar are as the porch, which leads from the knowledge of words to the knowledge of things. The subtleties of mathematics defecate the grossness of our apprehension, and supply the elements of a sounder and severer logic. And in the same manner the faculty which removes the illusions of external appearance, and enables us to "look into the seeds of time," is one which we are bound to estimate at its genuine value. The more we refine our faculties, other things equal, the wiser we grow: we are the more raised above the thickness of the atmosphere that envelops our fellow-mortals, and are made partakers of a nature superhuman and divine.