I have related all this as I recollect it in order to show the reader the nature of my cogitations. No philosophical theory attracted me so much as scepticism, which at one period brought me to a state of mind verging upon insanity.

I took the fancy into my head that no one nor anything really existed in the world except myself — that objects were not objects at all, but that images of them became manifest only so soon as I turned my attention upon them, and vanished again directly that I ceased to think about them. In short, this idea of mine (that real objects do not exist, but only one’s conception of them) brought me to Schelling’s well-known theory. There were moments when the influence of this idea led me to such vagaries as, for instance, turning sharply round, in the hope that by the