“I believe it has required a long series of accepted observations for us to have arrived at this idea, now so natural in appearance, that the modifications produced within our nervous system are the only states of which we can have a direct consciousness; and as experimental demonstration is always limited, there can be no absolute certainty that things never happen otherwise, that we never go outside ourselves, and that neither our consciousness nor our nervous influx can exteriorise itself, shoot beyond our material organs, and travel afar in pursuit of objects in order to know or to modify them.”

Source: The Mind and the Brain, 1907, p. 17

Adopted from Wikiquote. Last update Oct. 2, 2025. History

Help us to complete the source, original and additional information

Do you have more details about the quote "I believe it has required a long series of accepted observations for us to have arrived at this idea, now so natural in…" by Alfred Binet?

Alfred Binet21

French psychologist and inventor of the first usable intell… 1857–1911

Related quotes

“Under the conditions of modern life we have more control over our thoughts, and in connection with this there is a special method by which we may work on the development of our consciousness using that instrument which is most obedient to our will; that is, our mind, or the intellectual centre. In order to understand more clearly what I am going to say, you must try to remember that we have no control over our consciousness. When I said that we can become more conscious, or that a man can be made conscious for a moment simply by asking him if he is conscious or not, I used the words "conscious" or "consciousness" in a relative sense. There are so many degrees of consciousness and every higher degree means "consciousness" in relation to a lower degree. But, if we have no control over consciousness itself, we have a certain control over our thinking about consciousness, and we can construct our thinking in such a way as to bring consciousness. What I mean is that by giving to our thoughts the direction which they would have in a moment of consciousness, we can, in this way, induce consciousness.”

P. D. Ouspensky (1878–1947) Russian esotericist

Fourth Lecture, p. 74.
The Psychology of Man's Possible Evolution (1950)

“When we attempt to understand the inmost nature of the outer world, we stand before it as before absolute darkness. There probably exists in nature, outside of ourselves, neither colour, odour, force, resistance, space, nor anything that we know as sensation. Light is produced by the excitement of the optic nerve, and it shines only in our brain; as to the excitement itself, there is nothing to prove that it is luminous; outside of us is profound darkness, or even worse, since darkness is the correlation of light. In the same way, all the sonorous excitements which assail us, the creakings of machines, the sounds of nature, the words and cries of our fellows are produced by excitements of our acoustic nerve; it is in our brain that noise is produced, outside there reigns a dead silence. The same may be said of all our other senses.

...In short, our nervous system, which enables us to communicate with objects, prevents us, on the other hand, from knowing their nature. It is an organ of relation with the outer world; it is also, for us, a cause of isolation. We never go outside ourselves. We are walled in. And all we can say of matter and of the outer world is, that it is revealed to us solely by the sensations it affords us, that it is the unknown cause of our sensations, the inaccessible excitant of our organs of the senses, and that the ideas we are able to form as to the nature and the properties of that excitant, are necessarily derived from our sensations, and are subjective to the same degree as those sensations themselves.”

Alfred Binet (1857–1911) French psychologist and inventor of the first usable intelligence test

Source: The Mind and the Brain, 1907, p. 25

“When we put our central nervous system outside us we returned to the primal nomadic state.”

Marshall McLuhan (1911–1980) Canadian educator, philosopher, and scholar-- a professor of English literature, a literary critic, and a …

1990s and beyond, "The Agenbite of Outwit" (1998)

“Whatever plane our consciousness may be acting in, both we and the things belonging to that plane are, for the time being, our only realities. As we rise in the scale of development we perceive that during the stages through which we have passed we mistook shadows for realities, and the upward progress of the Ego is a series of progressive awakenings, each advance bringing with it the idea that now, at last, we have reached "reality"; but only when we shall have reached the absolute Consciousness, and blended our own with it, shall we be free from the delusions produced by Maya [illusion].”

Helena Petrovna Blavatsky (1831–1891) occult writer

“I believe that we are consciousness, consciousness is energy, and energy can never be destroyed. It can be transformed, but it can never be destroyed.”

Helen Reddy (1941) Australian actress

On reincarnation, as quoted in "AN INTERVIEW WITH HELEN REDDY" by Gary Barg, TheSilverPages.com, 22 April 2014 http://thesilverpages.com/articles/an-interview-with-helen-reddy