Happy cos If you're happy あなた don't care if you're ugly または pretty [Physical Attractiveness]. あなた don't care if あなた Healty または not. あなた don't care about being rich または poor [Wealth], または don't care if あなた dumb または smart [Intelligence]. All it matter is that you're happy
Intelligence, since I could earn everything else on the 一覧 with it. Except physical attractiveness, of course, but if I got money from being intelligent, I could in turn pay for plastic surgery. So, intelligence is the key to all.