1 John 2:22-23: “Truly God and Truly Man” 
1 John 2:22-23: Who is the liar but he who denies that Jesus is the Christ? This is the antichrist, he who denies the Father and the Son. No one who denies the Son has the Father. Whoever confesses the Son has the Father also. 
Throughout church history many people have denied Christ’s deity and/or humanity.  Even today, Mormonism claims that Jesus was once a man who became a god and we can become gods ourselves.  Other modern examples abound. What happens if we waver on the incarnate Christ’s being truly God and truly man? We worship a god who cannot save because he is powerless and cannot represent us.  John also teaches that we cannot know God the Father if we do not understand His revelation to us in His Son.  Loose/misguided Christology leads to eternal damnation, misunderstanding God, and creates lies. 
Do you grasp how serious this is? These are not arbitrary opinions founded on subjective desires. This is eternal life or death.  This is the Gospel: how the eternal Son of God became man so His elect could be saved, sanctified, restored.  If you are a Christian, are you careful in articulating Christ so that you are presenting Him faithfully as much as possible?  If you are a non-Christian: do not be deceived by the many antichrists and lies about Jesus.  The LORD Jesus is the risen, incarnate, exalted Son of God Who saves sinners. Put your faith in Him, and you will be saved. 
This blog was written by Seth Dunn
 Stephen Nichols. “The Humanity of Jesus: The Ligoner Statement on Christology.” www.Ligoner.org. Accessed 1 August 2019. https://www.ligonier.org/blog/the-humanity-of-jesus-the-ligonier-statement-on-christology/.
 John Calvin. Commentaries on the Catholic Epistles. Trans. and ed.: John Owen. (Grand Rapids, MI: Baker Book House, 1979), 195.
 Carl Trueman. “Tertullian.” (Lecture: Westminster Theological Seminary, Glenside, PA, October 8, 2015).
 Calvin, Commentaries on the Catholic Epistles, 197.
 Calvin, Commentaries on the Catholic Epistles, 198.
 John 14:6; Acts 4:14.
 John 1:1, 3:16; Ephesians 1:3-14; Philippians 2:5-11; Colossians 1:15-20; Hebrews 1:1-4, 1 John 3:1-10; etc.
 Calvin, Commentaries on the Catholic Epistles, 195.
 Matthew 7:15-20; Romans 16:17-18; Ephesians 5:6-13; Galatians 6:1-10; 1 John 4:1-6.
 Ephesians 2:1-10.