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數學中最重要的是要有良好的直覺。

Sometimes we get sad about things and we don’t like to tell other people that we are sad about them. We like to keep it a secret. Or sometimes, we are sad but we really don’t know why we are sad, so we say we aren’t sad but we really are.

最好是不失敗，其次則是敗了卻還有辦法成功，這才叫善于用人。?

釋義：知足常樂的人會感到快樂，沒有欲望沒有追求的人會感到輕松。