許太史，字敬之，世居許昌，以道家禅语感悟人生。曾祖琰、祖王、父肅，皆高節不仕。母夫人夢金鳳衘珠墜掌中，被吞後腹動，有娠而生真君焉。真君少通踈，与物无忤，射一麀鹿子墮而斃之，因感悟弃弓矢为学。
博通經史明天文地理音律五行讖緯神僊之術尤精。聞西安吳猛得至人丁義神方乃往師之傳其祕以求善地為栖真所。在逍遙山金氏宅徙居今玉隆萬壽宮日以為事有丹井藥臼存焉。不求聞達鄉黨化其孝友交游服其德義。
郡舉孝廉不就朝廷屢加禮命不得已乃為蜀郡旌陽縣令視事初誡吏胥去貪鄙除煩細脫囚縶開諭以道吏民悅服咸願自新發擿如神。此聽訟必先教以忠孝慈仁忍慎勤儉近賢遠姧去貪戢暴具載文誡言甚詳悉復患百里之遠難於戶曉乃擇秀民與耆老委勸率故爭競之風日銷久而至於無訟。
先是歲饑民無以輸租郡邑繩以法率民多流移真君乃用靈丹點瓦礫使人人潜瘞於縣圃一日籍民未輸納者咸造庭使服力後圃民钁地獲金得以輸納遂悉安堵鄰境流民慕德惠來依附者甚衆遂至戶口增衍屬歲大疫死十七八真君拯治之符咒所及登時愈至痊者傳聞他郡病相繼千計於是標竹郭外十里江置符水其中俾就竹下飲皆瘥或不能自至汲歸飲亦獲痊安蜀民謠曰：人無盜竊吏無奸欺我活人病無能為。
後江左民來汲水旌陽真君咒水器置符其中持歸置江濱植竹標所俾病飲江左亦良愈今號蜀江錦水屬瑞州高安縣任旌陽既久知晉室將亂棄官東歸旌陽改德陽表真君德及民也尋移治西故址觀今號旌陽觀蜀 民感德化計借留立生祠家傳畫像敬事如神啟行送者蔽野有千里始還者隨至宅願服役不返者結茭居狀營壘多氏族改姓許家營遺愛及민有如此者。
True to his name, he was known for his wisdom and kindness. He was a master of the Daoist arts and had a deep understanding of the natural world. He lived in harmony with nature and used his knowledge to help others.