“To talk of immaterial existences is to talk of nothings. Tosay that the human soul, angels, god, are immaterial, is tosay they are nothings, or that there is no god, no angels,no soul. I cannot reason otherwise .. . without plunginginto the fathomless abyss of dreams and phantasms. I amsatisfied, and sufficiently occupied with the things whichare, without tormenting or troubling myself aboutthose which may indeed be, but of which I have noevidence.”