preceptial

a. instructive教诲的。
preceptial medicine: medicine composed of preceptsor wise sayings. cure comprised of rational arguments用格言构成的药物，用说理组成的药剂。
△Ado.5.1.(23):“Their counsel turns to passion,which before / Wouldgive preceptial medicine to rage，”他们的劝告就会变成强烈的感情，而在此以前他们只是用格言治疗激愤。