How do we know Jesus has authority over death?

The assertion that Jesus possesses the keys of death signifies His supreme authority over all aspects of existence, especially concerning life and death. This claim is rooted deeply in biblical theology, where Jesus is depicted not only as the Redeemer who conquered death through His resurrection but also as the sovereign Lord who governs the living and the dead. His power is absolute; nothing can happen to us without His decree. This reality is evident in both Revelation and the teachings of Hebraic tradition concerning life, death, and divine sovereignty.