2 Peter 1:19
"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:"2 Peter 1:19 (KJV)
Context from 2 Peter 1
17
For he received from God the Father honour and glory, when there came such a voice to him from the excellent glory, This is my beloved Son, in whom I am well pleased.
18
And this voice which came from heaven we heard, when we were with him in the holy mount.
19
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:
20
Knowing this first, that no prophecy of the scripture is of any private interpretation.
21
For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.