《史记·十二本纪·高祖本纪》
留侯说： 不如就此封他为王，让他自己防守齐地。 
留侯曰： 不如因而立之，使自为守。 
Mr. Liu said: It is better to seal him as a king and let him defend the land of Qi by himself.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 留侯曰： 不如因而立之，使自为守。  [/INST] Mr. Liu said: It is better to seal him as a king and let him defend the land of Qi by himself.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 留侯曰： 不如因而立之，使自为守。
user
Mr. Liu said: It is better to seal him as a king and let him defend the land of Qi by himself.
assistant