How do we know God's chosen people will serve Him?

The assurance that God's elect will serve Him is rooted in His covenants and the work of Christ. As seen in Joshua 24:14-15, the call to serve the Lord is significant; however, it is only through the work of the Holy Spirit that one can truly respond. According to Reformed theology, God does not simply offer salvation and leave the choice up to man. He actively regenerates the hearts of His chosen ones, ensuring they will embrace Him and serve Him wholeheartedly. This is illustrated through God’s historical dealings with the patriarchs and His faithfulness to His covenant promises.