What does it mean that Christ has the keys of hell and death?

When Jesus states that He holds 'the keys of hell and death' in Revelation 1:18, it conveys His ultimate authority over these powerful entities. For Christians, this means that death is not the end; Christ has conquered it and offers eternal life to those who believe in Him. The keys represent His dominion and control, suggesting that nothing can happen without His permission, including the trials believers face in life. This assurance empowers Christians to face suffering and mortality with courage, knowing they are secure in His everlasting arms.