For granting this explication of the thing to be true, yet the idea of the cause of light, if we had it never so exact, would no more give us the idea of light itself, as it is such a particular perception in us, than the idea of the figure and motion of a sharp piece of steel would give us the idea of that pain which it is able to cause in us.
Zeren gauzaren azalpen hau egiazkoa dela onartuta ere, argiaren kausaren ideia zehazki harturik eduki arren, ez liguke argiaren beraren ideia zehatzagorik emanen gure ideia partikular bezala, altzairuzko tresna zorrotz baten irudi eta higidurak, tresna horrek eragin liezagukeen oinazearen bidez, emanen ligukeen ideia baino.