1 Jn 5:1, Jn 14:6-7, Mt 10:33, Jn 17:3, 1 Jn 4:15, Lk 10:16, 2 Jn 1:7, Jn 15:23, Jn 5:23, Jn 8:19

Those who deny that Jesus is the Christ are liars and antichrists. (1 John 2:22-23, 2 John 1:7)

1 John 2:22 Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son. 23 Whosoever denieth the Son, the same hath not the Father: he that acknowledgeth the Son hath the Father also.

2 John 1:7 For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.

Jesus is the Christ. (1 John 5:1)

1 John 5:1 Whosoever believeth that Jesus is the Christ is born of God: and every one that loveth him that begat loveth him also that is begotten of him.

No one can meet God except through Jesus. (John 14:6-7, Matthew 10:33)

John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. 7 If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.

Matthew 10:33 But whosoever shall deny me before men, him will I also deny before my Father which is in heaven.

To believe that Jesus is the Christ and that He is the Son of God is eternal life. (John 17:3, 1 John 4:15)

John 17:3 And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.

1 John 4:15 Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.

To not believe that Jesus is the Christ is to forsake God. (Luke 10:16, John 15:23, John 5:23, John 8:19)

Luke 10:16 He that heareth you heareth me; and he that despiseth you despiseth me; and he that despiseth me despiseth him that sent me.

John 15:23 He that hateth me hateth my Father also.

John 5:23 That all men should honour the Son, even as they honour the Father. He that honoureth not the Son honoureth not the Father which hath sent him.

John 8:19 Then said they unto him, Where is thy Father? Jesus answered, Ye neither know me, nor my Father: if ye had known me, ye should have known my Father also.