How do we know the doctrine of the effectual call is true?

The doctrine of the effectual call asserts that when God calls His elect to salvation, that call is not only inviting but also powerful and effective. This means that those whom God calls will respond positively to the gospel, as illustrated in John 6:37, where Jesus states, 'All that the Father gives me will come to me.' The effectiveness of this call is rooted in the sovereignty of God, assuring that His purposes will not fail. Romans 8:30 further supports this notion, affirming that those whom He predestined, He also called, demonstrating a definite and purposeful plan of salvation.