Why is effectual calling necessary for salvation?

Effectual calling is a crucial doctrine that denotes God's sovereign initiative in the salvation of His people. As noted in the sermon, there is a general call of the Gospel that goes forth to all, but effectual calling is when God uniquely and powerfully draws an individual to Himself, enabling them to respond in faith and repentance. This call is designed to bless, offering security and eternal life, and is confirmed in believers by the inward work of the Holy Spirit. Effectual calling ensures that those whom God has chosen will inevitably come to faith, as it is imbued with divine authority and purpose. Paul highlights this in 1 Thessalonians 2:13, affirming that when the Word of God is received as true, it effectually works in those who believe.