The ethos of the aristocracy as exemplified in the English public school greatly influenced Pierre de Coubertin.[168] The public schools subscribed to the belief that sport formed an important part of education, an attitude summed up in the saying mens sana in corpore sano, a sound mind in a sound body. In this ethos, a gentleman was one who became an all-rounder, not the best at one specific thing. There was also a prevailing concept of fairness, in which practising or training was considered tantamount to cheating.[168] Those who practised a sport professionally were considered to have an unfair advantage over those who practised it merely as a hobby.[168]