How do we know that Christ conquered sin and death?

In the sermon, it is highlighted that Christ's sacrifice was not just arbitrary but a deliberate act to fulfill the requirement of the law and to conquer sin entirely. He became sin for His people (2 Corinthians 5:21), accepting the punishment that they deserved. Through His death, He has taken the sting out of death (1 Corinthians 15:55) by rising from the dead, thereby demonstrating His power over both sin and death. This means that believers have nothing to fear regarding judgment or eternal separation from God, as Christ has secured eternal life for them through His resurrection. The resurrection itself serves as the ultimate proof that death has been defeated for all who trust in Him.