Is There a Difference Between Being Sane and Insane?

"If you're a materialist, you don't like this. If you're a scientist, you don’t like this," he says. "Because what i'm doing is erasing all the boundaries that you have used to anchor your entire psyche." 'We're very, very threatened when the boundary between reality and phantasy is blurred or erased in some way,' he adds. ‘It's undermining your entire sense of physical reality'