“Having zero clutter is an entirely different experience than having a little clutter. The psychological effect of reducing any type of mess to zero is profound. It feels like a noisy fan has shut off. Now I love the feeling of being at zero, and I never want to be far from it. Every neglected possession, unanswered email or open browser tab is like a little hook in your brain. There isn’t a huge difference in how it feels to have six of these hooks in your brain versus having eighty, but there is a vast difference between having some and having zero.”

David Cain expands on this at Raptitude