What is the consequence of not preaching only what Christ preached?

When the church strays from preaching the doctrine that Christ imparted, it risks falling into spiritual deception. This is underscored in 2 John 1:9, which states that those who do not abide in the doctrine of Christ do not have God. Such departures can lead to myriad variations of the gospel that confuse and mislead congregations. The consequence of not adhering to Christ’s teachings is not merely an academic failing; it has dire implications for the eternal state of souls. The faithful preaching of Christ’s doctrine is essential for nurturing genuine faith and ensuring believers are rightly aligned with God's redemptive plan. Therefore, maintaining fidelity to the teachings of Christ protects both the church's integrity and the spiritual well-being of its members.