What does it mean that Jesus holds the keys of hell and death?

When Jesus claims to hold the keys of hell and death in Revelation 1:18, it illustrates His ultimate authority over death and the afterlife. This assertion not only reflects the power He has to grant eternal life but also indicates His dominion over sin and judgment. For believers, this should offer profound comfort as it signifies that their salvation and eternal security rest in the hands of the one who conquered death through His resurrection. This encapsulates the essence of hope found in the gospel: that through Christ, believers triumph over death and can look forward to eternal life with Him.