The Blog of Random on the split-brain experiment:

The split-brain experiments show the incredible ability of the human mind to adapt in any situation that it is placed in. They also show that all of those quizzes about being “left-brained” or “right-brained” due to being more “artsy” or “sciency” are completely false. In reality, both hemispheres are equally important to function as a normal human being, and tests have shown that both hemispheres are used equally in most situations, whether you’re painting or solving a math problem.

Sam Harris, in Waking Up:

What is most startling about the split-brain phenomenon is that we have every reason to believe that the isolated right hemisphere is independently conscious.

It is amazing to consider the outsize impact our left hemisphere has on our conscious perception relative to its importance. We live with a silent self that knows quite a lot about its chattier half–and that interest seems exclusive.

I might argue, too, that our left hemisphere is responsible for a considerable amount–if not most–of our suffering.