How do we know the effectual calling of God is true?

The effectual calling is described as an inward and powerful invitation from God that goes beyond the general call of the gospel. It is where the Holy Spirit works in the hearts of individuals, leading them to recognize their sin and need for Christ. This is grounded in Scriptures such as Romans 8:30, which outlines the chain of salvation that begins with God's predestination and culminates in glorification. Those who have experienced this inward call can testify to the transformative change in their lives, affirming that it is indeed true.