I got up with Stoic fortitude of mind in the cold this morning; but afterwards, in my hot bath, I joined the school of Epicurus. I was a Materialist at breakfast; after it an Idealist, as I smoked my first cigarette and turned the world to transcendental vapour. But when I began to read the Times I had no doubt of the existence of an external world.

So all the morning and all the afternoon opinions kept flowing into and out of the receptacle of my mind; till, by the time the enormous day was over, it had been filled by most of the widely-known Theories of Existence, and then emptied of them.