そもそも外道とは

mu stegs pa // also mu stegs can / tīrthika a heretic, one who argues on religion, a schismatic [lit. one creating a passage through the circuit of life, or one indulging in pilgrimage; also, one who holds extreme views and does not follow the middle doctrine of Buddha; hence, a non-Buddhist, such as the followers of Brahmanism or Jainism]S. mu stegs can gyi ston pa drug the six heretical teachers of Buddha's time: -- (1) ḥgro ba skyoṅ gi mu rdsogs byed ḥod sruṅ ; (2) gnag lhas kyi bu kun tu rgyu ; (3) smra ḥdod kyi bu moḥi bu yaṅ dag rgyal ba can ; (4) mi ḥpham skraḥi la ba can ; (5) ka taḥi bu nog can ; (6) gñen bu gcer bu ; these six Tirthika teachers were known as the six Tārkika (rtog ge drug) (K. du. ka, 33-43). The sixth of those is asserted to have been the founder of Jainism.