The term used means to watch over, hold fast,
and so to take seriously the content of what has been revealed. The content of this revelation affects the hearers’ thinking and so their actions. In practice this means that recipients of this revelation acknowledge Christ’s sovereignty over history and so see the events of history (of the past and of the present) as Christ at work, hastening his return.
7 “And behold, I am coming soon. Blessed is the one who keeps the words of the prophecy of this book.”