How does heresy relate to belief in Christ?

In Reformed theology, heresy encapsulates every deviation from the orthodox belief in Jesus as the sole means of salvation. Unbelief manifests through the act of opining or having personal interpretations of truth rather than acknowledging and surrendering to the absolute truth of Scripture. The believer, in contrast, recognizes that faith is a gift from God, which involves trusting in Christ alone and His finished work. True belief does not entertain alternate opinions; rather, it rests fully on the truth of Christ as revealed in Scripture, effectively negating the stance of heresy.