How do we know the doctrine of irresistible grace is true?

Irresistible grace, a key component of the Reformed understanding of salvation, posits that when the Holy Spirit effectively calls a person to faith, they will inevitably respond. This is not based on human merit but rather on God's sovereign will and initiative. John 6:44 says, 'No man can come to me, except the Father which hath sent me draw him.' This illustrates that God's drawing is not an external prompting but an internal transformation of the heart.

Furthermore, in John 6:65, Jesus reiterates, 'Therefore said I unto you that no man can come unto me except it were given unto him of my Father.' This reinforces the belief that the ability to respond affirmatively to the gospel is itself a gift from God. Therefore, those whom God chooses will come to know Christ, reflecting the truth of irresistible grace.