These words repeat what Jesus had already said in Revelation 22:7 (see also Revelation 3:11). The repetition of these words in the present text underscores not only the reality of his return but also that his return happens in the context of evildoers still doing evil, the filthy still being filthy, the righteous still doing right and the holy still being holy. His coming requires self-examination concerning personal lifestyle choices.
12 “Behold, I am coming soon, bringing my recompense with me, to repay each one for what he has done.