デール・カーネギーの名言 It isn’t what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.-経営者の格言集

経営者の偉い人、デール・カーネギーの名言「It isn’t what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.」のGIF画像