Learning about music became, for all intents and purposes, an  addiction. Each new note, each new chord, each new scale and each new rhythm brought me closer to something that I desperately longed for: the capacity to make my own music. ... When I read some new neuroimaging studies that suggested that new knowledge can bring the same sort of surge of dopamine one might get by ingesting crack cocaine, I could only nod in agreement. ... creating my own music [was] an adventure that seemed to bring me into a new place altogether: meditative, beautiful, intoxicating.

Gary Marcus,
in Guitar Zero