"The world is given to me only once, not one existing and one perceived. Subject and object are only one. The barrier between them cannot be said to have broken down as a result of recent experience in…"

"The first thing to say is that of course I don't believe in the existence of 'my' cat, or 'your' cat, or 'the' cat. There is only one cat, which is the cat of the universe. And it's not even a cat, it…"

"The path to knowledge is paved with doubt."

"If we are to be honest, we must admit that the present state of physics offers no hope of a satisfactory picture of the world."

"What we observe as material bodies and forces are nothing but shapes and variations in the structure of space. Particles are just schaumkommen (appearances)!"