2 Peter 2:19 says, And we have the word of the prophets made more certain, and you will do well to pay attention to it, as to a light shining in a dark place, until the day dawns and the morning star rises in your hearts.
The KJV translates this verse, 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:
Peter is pointing to the fact that we do not only have his and the other apostle's word as to the truth he is speaking, but also the more sure word of prophecy and we would do well to pay attention to it.
For example, Jesus fulfilled 332 Old Testament prophecies regarding Him being the Messiah. Statistically, it has been calculated that the probability of any one man fulfilling eight of these prophesies is one in 100,000,000,000,000,000 (10 to the 17th power). That number of silver dollars would cover the state of Texas two feet deep. Stoner says that if you consider 48 of the prophecies, the odds become one in 10 to the 157th power.