1:19 we have something more sure, the prophetic word. The prophetic word of Scripture is a more solid proof than even the spectacular experience of witnessing the Transfiguration.

the morning star. This probably alludes to Num. 24:17, a passage that is interpreted messianically (Rev. 2:28; 22:16). If so, the symbol refers to Christ in His Second Coming.

rises in your hearts. A difficult phrase, since “day dawns” and “morning star” apparently refer to the Second Coming of Christ, an external event. Peter probably refers to the effect on believers of the full revelation that will accompany Christ’s return. His readers must pay attention to the sure “prophetic word” until the day when that word will be superseded by the full revelation to come.