God's call is effectual because it results in genuine transformation and leads to salvation, as seen in the story of Zacchaeus.
The effectual nature of God's call is evidenced in the transformation of those He calls. In the case of Zacchaeus, upon receiving the call from Jesus, he joyfully accepted and immediately began to change his ways, as he proclaimed his intent to give to the poor and repay what he owed. This change reflects a heart that has been genuinely transformed by grace. The call is not merely an invitation; it carries the power to change lives, as indicated in John 10:27-30 and Psalm 23, which illustrate that God's sheep will hear His voice and follow Him. Thus, His call is not just a momentary event but initiates a lasting change in the hearts of those chosen for salvation.
Scripture References:
Luke 19:5-10, John 10:27-30, Psalms 23, John 17:20-23, Romans 8:14-15
Commentary