“The centermost processes of the brain with which consciousness is presumably associated are simply not understood. They are so far beyond our comprehension that no one I know of has been able to imagine their nature.”

Nobel lecture (1981)
Context: One of the more important things to come out of the split-brain work, as an indirect spin-off, is a revised concept of the nature of consciousness and its fundamental relation to brain processing. The key development here is a switch from prior non-causal, parallelist views to a new causal, or "interactionist" interpretation that ascribes to inner experience an integral causal control role in brain function and behavior. In effect, and without resorting to dualist views, the mental forces and properties of the conscious mind are restored to the brain of objective science from which they had long been excluded on materialist-behaviorist principles.

Source: The Dragons of Eden (1977), Chapter 9, “Knowledge is Our Destiny: Terrestrial and Extraterrestrial Intelligence” (pp. 242-243)

The Mind Map Book, Buzan and Buzan (1991)

Episode three: "The Final Hour".
Atheism: A Rough History of Disbelief (2004)

Jane Sinnett, trans 1846 p. 47
The Vocation of Man (1800), Knowledge

Wholeness and the Implicate Order (1980)

"Cardboard Darwinism", pp. 48–49
An Urchin in the Storm (1987)

Tragedy and Triumph of Reason (1985)
Context: In medical science arguments are going on between behaviorists who perceive the function of brain as a multitude of simple and unconscious conditioned reflexes, and cognitivists who insist that humans sensing the surrounding world create its mental image which can be considered as memory of facts.
I do not intend to argue the essence of these processes, all the more so because it has been proved that both types of memory function in the brain. However, I am convinced that those who once saw a nuclear explosion or imagined the victims of Hiroshima and Nagasaki will forever maintain the mental picture of horror-stricken and dust-covered Earth, burned bodies of the dead and wounded and people slowly dying of radiation disease. Prompted by the sense of responsibility for the fortunes of the human race, Einstein addressed the following warning to his colleagues: "Since we, scientists, face the tragic lot of further increasing the murderous effectiveness of the means of destruction, it is our most solemn and noble duty to prevent the use of these weapons for the cruel ends they were designed to achieve".

§ 44
New Era Community (1926)