How do we know that many are called but few are chosen?

The assertion that 'many are called, but few are chosen' reflects the sovereign grace of God in salvation. In the parable of the great supper, we see God's desire to invite all to His feast, yet only those who accept His call in accordance with His divine will are chosen. This underscores the necessity of regeneration and the effectual work of the Holy Spirit in bringing individuals to true faith. God's sovereignty ensures that His chosen ones respond to the invitation in faith, demonstrating that salvation is rooted not in human choice but in God's sovereign grace.