▁investig ated ▁what ▁is ▁prof ound . ▁People ▁say , ▁their ▁understanding ▁is ▁lack ing ▁and ▁they ▁have ▁not ▁fully ▁exam ined ▁it ▁[ its ▁prof ound ness ]. ▁I , ▁myself , ▁don ’ t ▁think ▁that ▁is ▁the ▁case … ▁The ▁her es ies ▁under ▁heaven , ▁they ▁are ▁also ▁rather ▁f oul . ▁Among ▁them , ▁Buddh ism ▁is ▁the ▁worst . ▁If ▁a ▁person ▁is ▁incl ined ▁to ▁Buddh ism ▁then ▁he ▁is ▁of ▁the ▁kind ▁that ▁purs ues ▁what ▁is ▁f oul . ▁Is ▁it ▁not ▁clear ▁that ▁there ▁is ▁nothing ▁further ▁to ▁discuss ? ▁It ▁is ▁like ▁Men cius ▁who ▁[ also ▁felt ▁no ▁need ▁to ▁argue ▁in ▁detail ▁when ▁he ] ▁critic ized ▁Yang ▁Z hu ▁and ▁Moz i . ▁Sure ly , ▁he ▁did ▁not ▁argue ▁further ▁than ▁to ▁say ▁Yang ▁Z hu ▁and ▁Moz i ▁did ▁not ▁respect ▁their ▁f athers ▁and ▁their ▁em per ors ." ▁However ▁he ▁writes ▁a ▁poem ▁that ▁seem ingly ▁supports ▁Buddh ism . ▁ ▁Buddh ism ▁was ▁a ▁part ▁of ▁the ▁Jose on ▁dynast y . ▁While ▁not ▁supported ▁public ly , ▁priv ately ▁it ▁was ▁very ▁pre val ent ▁in ▁Conf u cian - sch olar ▁officials . ▁ ▁Music ▁ ▁Main ▁article : ▁Music ▁of ▁Korea ▁ ▁  ▁  ▁  ▁The ▁Jose on ▁period ▁developed ▁several ▁musical ▁forms . ▁The ▁form ▁with ▁the ▁most ▁ext ant ▁pieces ▁is ▁s ijo ▁( H ang ul : ▁ 시 조 / H anja : ▁ 時 <0xE8> <0xAA>