How do we know God chooses those He saves?

The doctrine of election is rooted in God's sovereign will and love. In Deuteronomy 7:7-8, it is stated that God did not choose Israel because they were a great nation or more numerous than others, but because He loved them. This theme continues throughout scripture, asserting that salvation is an act of divine grace. In 2 Thessalonians 2:13, Paul writes that 'God hath from the beginning chosen you to salvation.' This shows that God's choice is not contingent on human action or worthiness, but solely on His grace and purpose.