How do we know God's elect are in the true Church?

The true Church is comprised of God's elect, those whom He has foreknown and predestined to be saved. This truth is articulated in various Scriptures, asserting that God chose specific individuals for His purposes. In the context of Exodus 12, the children of Israel are seen as God's chosen ones, set apart from the Egyptians. They recognized their identity as recipients of God's grace, thereby validating their place within the true Church. This understanding underlines the biblical doctrine that salvation is not based on human decision but rather on God's sovereign will and choice.