Le livre est rapidement devenu un classique ... de l’application BeYourself. "La méthode Napoleon Hill, comme la sophrologie, poussent les gens à définir leur propre besoin, à les nourrir ...

Nearly a century ago, journalist Napoleon Hill set out to uncover the key to wealth. He studied more than 500 self-made millionaires over a span of 20 years, and his research culminated in what ...