What does the Bible say about God's intent in salvation?

According to Isaiah 45:22-25, God's declaration of intent ensures that all He desires will be accomplished. This means that when God sends His Son to save sinners, it is not merely a desire or wish, but a firm intent that leads to actual salvation. His sovereignty means that what He intends, He accomplishes. This is foundational for understanding the assurance of salvation in a Reformed theological context, which emphasizes that God's will is never thwarted by human action or inaction.