When you say "Repentance of sin " is not Biblical, you are saying that Christ(Mark 1:15) does not understand what He is talking about.
False teachers are discrediting Jesus, the apostles by downgrading and look at their explanations of salvation if REPENTANCE is ever there?
Mar 1:15: "And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel."
Mat 3:8: "Bring forth therefore fruits meet for repentance:"
Mat 4:17: "From that time Jesus began to preach, and to say, Repent: for the kingdom of heaven is at hand."
Mat 9:13: "But go ye and learn what that meaneth, I WILL HAVE MERCY, AND NOT SACRIFICE: FOR I AM NOT COME TO CALL THE RIGHTEOUS, BUT SINNERS TO REPENTANCE."
Mat 11:20: "Then began he to upbraid the cities wherein most of his mighty works were done, because they repented not:"
Mat 11:21: "Woe unto thee, Chorazin! woe unto thee, Bethsaida! for if the mighty works, which were done in you, had been done in Tyre and Sidon, they would have repented long ago in sackcloth and ashes."
Mat 21:32: "For John came unto you in the way of righteousness, and ye believed him not: but the publicans and the harlots believed him: and ye, when ye had seen it, repented not afterward, that ye might believe him."
Luk 5:32: "I came not to call the righteous, but sinners to repentance."
Luk 13:3: "I tell you, Nay: but, except ye repent, ye shall all likewise perish."
Luk 13:5: "I tell you, Nay: but, except ye repent, ye shall all likewise perish."
Luk 15:10: "Likewise, I say unto you, there is joy in the presence of the angels of God over one sinner that repenteth."
Luk 24:47: "And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem."
Acts 3:19: "Repent ye therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord;"
