如鎔工之冶鑄然。鎔則同,鑄則異。鎔須化,若冶铁至如水,然後可鑄。此言詞句火候煉得鎔化。夫然一題一範,鑄出成篇。「鑄顔」本楊子《法言》。又如前朝何縈詩云:「天地大洪罏,鑄成活秦檜。」題意之美惡,須鑄得像。(https://www.daowen.com)