How do we know that Christ's calling is effective?

The effectiveness of Christ's calling is rooted in God's sovereign grace. In Isaiah 43:1, God declares, "Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine." This illustrates that God actively calls His chosen people by name and that this calling is effectual. It's not merely an invitation; it leads to a transformative response in the heart of the called. The nature of this calling is such that those who are called respond in faith, reflecting the divine initiative in salvation. We see this echoed in the New Testament as well, where it is affirmed that believers are called not only to salvation but to holiness. This reinforces the understanding that the calling is powered by God and assures us of its effectiveness.