Is 'But there are two kinds of  the pleasure of doing, and the pleasure of not doing; the pleasure of indulging, and the pleasure of abstinence.' a logical precursor to the hypothesis 'The pleasure of doing is much stronger than that of not doing.'
But there are two kinds of  the pleasure of doing, and the pleasure of not doing; the pleasure of indulging, and the pleasure of abstinence.###The pleasure of doing is much stronger than that of not doing.