A mind at liberty to reflect on its own observations, if it produce nothing useful to the world, seldom fails of entertainment to itself.
George BerkeleyThat thing of hell and eternal punishment is the most absurd, as well as the most disagreeable thought that ever entered into the head of mortal man.
George BerkeleyBut, say you, surely there is nothing easier than for me to imagine trees, for instance, in a park [. . .] and nobody by to perceive them. [...] The objects of sense exist only when they are perceived; the trees therefore are in the garden [. . .] no longer than while there is somebody by to perceive them.
George Berkeley