a more sure, &c. = the prophetic (Greek. prophetikos. See Romans 16:26) word (App-121.) more sure.
whereunto. to which.
that ye take heed. taking heed; "in your hearts" should follow here.
light. App-130.
shineth. App-106.
dark. Greek. auchmeros. Only here.
dawn. Greek. diaugazo. Only here.
day star. Greek. phosphoros. Only here.
arise. It will be. fulfillment of Numbers 24:17; Malachi 4:2. Not. spiritual experience.