“The first two-dimensional images were thus not two-dimensional representations of three-dimensional things in the material world, as researchers have always assumed. Rather, they were fixed mental ...”

“Perhaps the most striking feature of the west European Upper Palaeolithic, one on which many writers comment, is a sharp increase in the rate of change. Compared with the preceding Middle Palaeolit...”

“The notion that an image is a scale model of something else (say, a horse) requires a different set of mental events and conventions from those that perceive the social symbolism of red marks on so...”

“Around 30,000 years ago, in the Aurignacian, at the beginning of the Upper Palaeolithic, someone or some group in the Eyzies region invented drawing, the representation in two dimensions on the fla...”

“Consciousness has evolved biologically and can therefore be explained biologically.”

“The cerebral cortex, the outer skin of the brain, contains as many as ten billion neurons. This complexity is daunting. Yet it is out of complex interactions between the billions of neurons that co...”

“What drains your spirit drains your body. What fuels your spirit fuels your body.”

“What I aim to do is not so much learn the names of the shreds of creation that flourish in this valley, but to keep myself open to their meanings, which is to try to impress myself at all times wit...”

“Pleasure brings pain, but inner silence brings nothing negative; it is in itself of great value and is a far better way to be than to be in ego states.”