Why is it important to confess that Jesus Christ came in the flesh?

To confess that Jesus Christ came in the flesh means to recognize Him as the God-Man who fully embodies both divinity and humanity. According to 1 John 4:2, every spirit that acknowledges this truth is of God. This confession is not merely an acknowledgment of existence but an agreement with God's declaration of Jesus as the Savior. This doctrine assures believers of the complete work of Christ in achieving salvation, emphasizing that He came to redeem His people from their sins, which is foundational to Christian faith and assurance.