《资治通鉴·陈纪·陈纪十》
有人建议应该秘密准备，隋文帝说： 我将要替天行道，进行讨伐，有什么可保密的呢！ 
人请密之，隋主曰： 吾将显行天诛，何密之有！ 
Someone suggested that they should prepare in secret, but Emperor Wen of Sui said, "I am going to carry out a punitive expedition on behalf of heaven. What's there to keep secret!"