I like that analogy! I don't know, with 100% certainty, that the light will come on when I operate the switch, but I behave as though it will. (I actually have less faith in gravity, I'm half convinced that it might go 'pop' and stop working sometime, but I may be unique in that patricular lack of faith.)

I like the one about watering the garden as well, that sort of 'manipulation' makes a lot of sense to me.