The author is referring to a mental known as "flow": "Flow is the mental state of operation in which a person in an activity is fully immersed in a feeling of

The author is referring to a mental known as "flow": "Flow is the mental state of operation in which a person in an activity is fully immersed in a feeling of energized focus, full involvement, and success in the process of the activity. Proposed by Mihály Csíkszentmihályi, the positive psychology concept has been widely referenced across a variety of fields" -- http://en.wikipedia.org/wiki/Flow_%28psychology%29 http://en.wikipedia.org/wiki/Flow_%28psychology%29