Malcolm Gladwell in his book Outliers speaks about the 10,000 hour rule - that it takes this long to reach the heights of one's game given the appropriate experience, training, and, yes, even battle scars.
Malcolm Gladwell encwadini yakhe Outliers ukhuluma mayelana 10,000 ihora umthetho - ukuthi kuthatha isikhathi eside ukufinyelela ekuphakameni umdlalo komuntu inikezwe isipiliyoni esifanele, ukuqeqeshwa, futhi, yebo, ngisho impi izibazi.