Isifundo ngugqirha wezengqondo uPositivist uShawn Achor osekela ithiyori yakhe kuloo nto Kuya kufuneka utshintshe ifomula yempumelelo: inyanzelisa ukusebenza nzima ukufikelela empumelelweni xa ubukhulu becala kufuneka sikhathazeke ngokonwaba ukufikelela empumelelweni.