Luke 12:8-9 - "Also I say unto you, Whosoever shall confess Me before men, him shall the Son of man also confess before the angels of God: but he that denieth Me before men shall be denied before the angels of God."
John 9:22 - "These words spake his parents, because they feared the Jews: for the Jews had agreed already, that if any man did confess that He was Christ, he should be put out of the synagogue."
John 12:42-43 - "Nevertheless among the chief rulers also many believed on Him; but because of the Pharisees they did not confess Him, lest they should be put out of the synagogue: for they loved the praise of men more than the praise of God."
Acts 23:8 - "For the Sadducees say that there is no resurrection, neither angel, nor spirit: but the Pharisees confess both."
Acts 24:13-14 - "Neither can they prove the things whereof they now accuse me. But this I confess unto thee, that after The Way which they call heresy, so worship I the God of my fathers, believing all things which are written in the Law and in the Prophets."
Romans 10:9-11 - "That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised Him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. For the Scripture saith, Whosoever believeth on Him shall not be ashamed."
Romans 15:9 - "And that the Gentiles might glorify God for His mercy; as it is written, For this cause I will confess to thee among the Gentiles, and sing unto Thy name."
Philippians 2:10-11 - "That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth; and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father."
1 John 4:2,3,15 - "Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God: and every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world...Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God."
Failure to confess faith in Christ is, in reality, denying Him!