吴茀之：意在笔先，所以下笔有神。

用笔的道理，务去疲软而尚挺拔，除锐滞而贵松俊，绝浮滑而致沉着。譬如画一线，未落笔时，应如飞鸟投林，凭空作势；既落笔，则如云程发轫，从容而有力；中间部分，尤须挺腕力行，气不可断；收笔处更应藏锋得势，不可轻佻。作画能如此下功夫，自然笔到意随，运合法度了。https://mp.weixin.qq.com/s?__biz=MzA5NTY3NDEyMw==&mid=2659768130&idx=2&sn=0c6b42c4a5f95a4f998638faa2fbae8b&chksm=8a478668f1b4f8a97d0d53448f9c5b0388da89300485566d822dbaec1ce7dcb4a112b22edeae&forbs=1&scene=126&subscene=91&sessionid=1741564989&flutter_pos=1&clicktime=1741565055&enterid=1741565055&finder_biz_enter_id=5&ascene=56&fasttmpl_type=0&fasttmpl_fullversion=7634029-zh_CN-zip&fasttmpl_flag=0&realreporttime=1741565056007&devicetype=android-29&version=2800385b&nettype=WIFI&abtest_cookie=AAACAA%3D%3D&lang=zh_CN&session_us=gh_6dc2e4697018&countrycode=CN&exportkey=n_ChQIAhIQs2nl3mVLm9E8k0ofiGvuvRLxAQIE97dBBAEAAAAAAIv5Mj4MZT4AAAAOpnltbLcz9gKNyK89dVj0HVDJP34wijo83NKPuIdGmv1mu6nxnsCLzvxGkmETFdNGriKJ%2B1lerdjGDRWTzjWiONfagsgoE%2FSF6ygHA1xATcZz2%2BRF123qEJc2hfJz2UjKyHHfGu9fIor%2F8S5J%2Bd40nok%2FqOk%2BqjkbnYwSdR5r0WYct43TcuuTZ0f4NPCinUqZW4TD6sWqESivVKo%2FBeXuf1v%2B2QXuBw7uBQhV2Ko135HnLDZFvcPiz1CJ7bdpZgph5SIvF67QFKpapIB77M62eZGXYmWNwnhafBc%3D&pass_ticket=4ITMhCBjEGfvQt9iow4PCCXBNDeVSznrJhU1uAymO7k51pyBj2xxEqhFW5OTzJPn&wx_header=3