Principles Of Human Knowledge - pg. 39

The difference, then, between Berkeley's proof and the others is that for the latter, the complex nature of the world is evidence for the existence of a creating intelligence, whereas for Berkeley it is evident for the nature of that intelligence, whose existence has already been established. For them, if the world had been very different, there would have been no argument to God at all; Berkeley's proof, by contrast, starts from the mere fact that there is a world.