"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. And this voice which came from heaven we heard, when we were with him in the holy mount. 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 1:17-19 (KJV)

If you look at  2 Peter 1:19 (KJV) understanding it was written in Greek originally; “Daystar” derives from the Greek word “phosphoros”. Phos translates to the word “light” – figuratively, meaning moral and spiritual light and knowledge which enlightens the mind, soul or conscience, including the idea of purity, holiness and of consequent reward and happiness. Phero or phosoros translates into the words “to bring” – figuratively, meaning an absolute sense, a way or gate said to lead somewhere.

This verse in the spiritual sense is referring to that clear and comfortable knowledge of and strong faith in Christ which is the harbinger of an eternal day in life and blessedness.

_{(Source: The Complete Word Study Dictionary – New Testament: by Greek Scholar Dr. Spiros Zodhiates Th.D)}