How do we know that faith and repentance are gifts from God?

Acts 11:18 highlights that God grants repentance to the Gentiles, confirming the belief that both faith and repentance are gifts from God. Theologically, this aligns with the understanding of God's sovereignty in salvation, where Ephesians 2:8 states that we are saved by grace through faith, which is not of ourselves but is the gift of God. This underscores that neither faith nor repentance is a human achievement but rather divine endowments that enable individuals to respond to God's call.