“It’s all just in our heads.”

“Who cares if it’s all in our heads?”

Finally she looked at me, frowning.

“Who cares?” I said. “Yes, it’s all in my head. But pain is ‘all in my head’ too. Love is ‘all in my head.’ All the things that matter in life are the things you can’t measure! The things our brains make up! Being made-up doesn’t make them unimportant.”