During an individuals' immersion in a domain, the locus of flow experiences shifts--what was once too challenging becomes attainable and even pleasurable, while what has long since become attainable no longer proves engaging. Thus, the journeyman musical performer gains flow from the accurate performance of familiar pieces in the repertoire; the youthful master wishes to tackle the most challenging pieces, one most difficult to execute in a technical sense; the seasoned master may develop highly personal interpretations of familiar pieces; or, alternatively, return to those deceptively simple pieces that may actually prove difficult to execute convincingly and powerfully. Continued.