《贞观政要·卷十·论灾祥》
希望陛下不要因为自己功高盖世就骄傲自大，也不要因为天下太平已久就放纵逸乐。如果能始终如一地坚持德治，即使天上出现了彗星也不足为惧。 
愿陛下勿以功高古人而自矜大，勿以太平渐久而自骄逸，若能终始如一，彗见未足为忧。 
I hope that Your Majesty will not be proud and arrogant because of your surpassing achievements or become indulgent in pleasure because the nation has been at peace for many years. If you can persevere in your adherence to the rule of virtue, then even if a comet should appear in the sky it would be nothing to fear.