"which the L-rd your G-d commanded you": This refers to (being turned astray from) a negative commandment.
"on which to go": This refers to (being turned astray from) a positive commandment.
"and you shall remove the evil from your midst": Remove the doers of evil from Israel.
(Devarim 13:7) "If there shall incite you (yesitecha) your brother, the son of your mother": "hasatah" (as in "yesitecha") connotes deception, as in (I Kings 21:25) "… wherein Jezebel his (Achav's) wife hesatah."