Why is the dominion of Jesus important for Christians?

The dominion of Christ is a core tenet of sovereign grace theology, highlighting His supreme authority over all things, including salvation. In Revelation 1:16, Jesus states that He has the 'keys of hell and death,' emphasizing His power over life, death, and eternity. This dominion gives believers the confidence that nothing can thwart God's plans, for all things work together for the good of those who love Him (Romans 8:28). It assures Christians that they are secure in their salvation, as Jesus maintains authority over every aspect of their lives. His power is not only for control but also for ensuring that He will lose none of those the Father has given Him.