en_tn/rev/02/10.md

The devil is about to throw some of you into prison

The words "the Devil" here are a metonym for the people who obey the devil. Alternate translation: "The devil will soon cause others to put some of you in prison" (See: rc://en/ta/man/translate/figs-metonymy)

Be faithful until death

"Be faithful to me even if they kill you." The use of the word "until" does not mean that you should stop being faithful at death.

the crown

"the winner's crown." This was a wreath, originally of olive branches or laurel leaves, that was put on the head of a victorious athlete.

the crown of life

Possible meanings are 1) "a crown that shows that I have given you eternal life" or 2) "true life as a prize like a winner's crown" (See: rc://en/ta/man/translate/figs-metaphor)