4. How often may a man observe in himself, that whilst his mind is intently employed in the contemplation of some objects, and curiously surveying some ideas that are there, it takes no notice of impressions of sounding bodies made upon the organ of hearing, with the same alteration that uses to be for the producing the idea of sound? A sufficient impulse there may be on the organ; but it not reaching the observation of the mind, there follows no perception:
4. Zein sarri ohar gaitezkeen, gure gogamena objekturen bat arretaz kontenplatzen eta hango ideia batzuk buru-belarri begiratzen ari delarik, entzumen organoan egindako inpresioak ez dituela hautematen, hotsa ateratzen duten gorputzek, hotsaren ideia sortarazteko lain izan ohi den aldaketa eragin arren.