货尽而后知不足,是不知量也,事已,而后知货之有余,是不知节也
解释:货卖完了才知道不足,是由于不懂得计量;事情结束了才知道有余,是由于不懂得调节。
Under uncertainty, it's better to err on the side of being too aggressive than too passive.
The success of an enterprise cannot be achieved without a deep understanding of the market and respect for consumers.