How do we know that Christ is the worthy Lamb of God?

In Revelation 5:12, the elders sing, 'Worthy is the Lamb that was slain to receive power and riches and wisdom.' This affirmation identifies Christ as the only one worthy to redeem His people through His sacrificial death. John the Baptist recognized this when he introduced Jesus as the 'Lamb of God, which taketh away the sin of the world' in John 1:29, signifying that He came to bear the sins of a particular people chosen by God. Through His atoning work, Christ fulfills God's redemptive plan for His elect, manifesting His worthiness and role in salvation.