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Roger Wolcott Sperry

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When the brain is whole, the unified consciousness of the left and right hemispheres adds up to more than the individual properties of the separate hemispheres.

Roger Wolcott Sperry

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The American psychologist Julian Jaynes, in a controversial study on the origin of consciousness, argued that the bicameral mind - in which one of the hemispheres becomes specialized in silent reading - is a late development in humankind's evolution, and that the process by which this function develops is still changing.

Alberto Manguel

Unlike other aspects of cognitive function, emotions have never been readily confinable to one hemisphere. Though generated by lateralized input, the emotional effects tend to spread rapidly to involve both hemispheres, apparently through crossed fiber systems in the undivided brain stem.

Roger Wolcott Sperry

The impetuous conquests of Alexander, the more politic and premeditated extension of territory made by the Romans, the wild and cruel incursions of the Mexicans, and the despotic acquisitions of the incas, have in both hemispheres contributed to put an end to the separate existence of many tribes as independent nations, and tended at the same time to establish more extended international amalgamation. Men of great and strong minds, as well as whole nations, acted under the influence of one idea, the purity of which was, however, utterly unknown to them. It was Christianity which first promulgated the truth of its exalted charity, although the seed sown yielded but a slow and scanty harvest. Before the religion of Christ manifested its form, its existence was only revealed by a faint foreshadowing presentiment. In recent times, the idea of civilization has acquired additional intensity, and has given rise to a desire of extending more widely the relations of national intercourse and of intellectual cultivation; even selfishness begins to learn that by such a course its interests will be better served than by violent and forced isolation. Language more than any other attribute of mankind, binds together the whole human race. By its idiomatic properties it certainly seems to separate nations, but the reciprocal understanding of foreign languages connects men together on the other hand without injuring individual national characteristics.

Wilhelm von Humboldt

A Vastness, as a Neighbor, came,
A Wisdom, without Face, or Name,
A Peace, as Hemispheres at Home
And so the Night became.

Emily Dickinson

Men standing in opposite hemispheres will converse and deride each other and embrace each other, and understand each other's language.

Leonardo da Vinci
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