《文心雕龙·明诗》
但是作品的体裁是有一定的，而人的思想却各不相同；作者只能随着个性的偏好来进行创作，所以很少能兼长各体。
然诗有恒裁，思无定位，随性适分，鲜能通圆。
However, the genre of the work is subject to certain constraints, while the thoughts of people are different; authors can only carry out creation according to their individual preferences, so it is rare that one can excel in various genres.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 然诗有恒裁，思无定位，随性适分，鲜能通圆。 [/INST] However, the genre of the work is subject to certain constraints, while the thoughts of people are different; authors can only carry out creation according to their individual preferences, so it is rare that one can excel in various genres.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 然诗有恒裁，思无定位，随性适分，鲜能通圆。
user
However, the genre of the work is subject to certain constraints, while the thoughts of people are different; authors can only carry out creation according to their individual preferences, so it is rare that one can excel in various genres.
assistant