89

Custom is our nature. He who is accustomed to the faith believes in it,
can no longer fear hell, and believes in nothing else. He who is
accustomed to believe that the king is terrible ... etc. Who doubts then
that our soul, being accustomed to see number, space, motion, believes
that and nothing else?


90

_Quod crebro videt non miratur, etiamsi cur fiat nescit; quod ante non
viderit, id si evenerit, ostentum esse censet._[56] (Cic. 583.)


91

_Spongia solis._[57]--When we see the same effect always recur, we infer
a natural necessity in it, as that there will be a to-morrow, etc. But
nature often deceives us, and does not subject herself to her own rules.


92

What are our natural principles but principles of custom? In children
they are those which they have received from the habits of their
fathers, as hunting in animals. A different custom will cause different
natural principles. This is seen in experience; and if there are some