I do not know by what power I think; but well I know that I should never have thought without the assistance of my senses. That there are immaterial and intelligent substances I do not at all doubt; but that it is impossible for God to communicate the faculty of thinking to matter, I doubt very much. I revere the Eternal Power, to which it would ill become me to prescribe bounds. I affirm nothing, and am contented to believe that many things are possible than are usually thought so".