As simple as possible, but not any simpler.
Real simplicity, radical simplicity, is scary. You know you’re getting close when you start to feel uncomfortable. When you experience something for the first time, and it works so simply you know it’s just right. Without explanation, no instructions needed. If you can’t explain it simply, you don’t understand it well enough. We believe that great work isn’t about adding more, it’s the discipline and tenacity to refine and reduce until it’s perfect.