King James Version
We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:English Standard Version
And we have something more sure, the prophetic word, to which you will do well to pay attention as to a lamp shining in a dark place, until the day dawns and the morning star rises in your hearts,Catholic Public Domain Version
And so, we have an even firmer prophetic word, to which you would do well to listen, as to a light shining within a dark place, until the day dawns, and the daystar rises, in your hearts