“Deep practice is built on a paradox: struggling in certain targeted ways – operating at the edges of your ability, where you make mistakes – makes you smarter. Or to put it a slightly different way, experiences where you’re forced to slow down, make errors, and correct them – as you would if you were walking up an ice-covered hill, slipping and stumbling as you go – end up making you swift and graceful without your realizing it.” – Daniel Coyle
