It explains the fulfilment of the Old Testament's promise of a Messiah to David. The promise of the risen Saviour and coming King is unique to Christianity. The Authority of the Word. The Bible does not merely contain the Word of God, as some theologians hold. Since it is God who gave us the Bible, the Bible bears His authority in addition to being infallible and inerrant.
Obedience is mandatory once the authority of the Bible is conceded.
The Reliability of the Word. The term connotes trustworthiness, something that can be believed in. This truth can counteract the effect of false doctrines. You need to respond with an eager mind, a compliant will, and a believing heart. As the old spiritual warrior Paul knew days were numbered and looked back on his earthly ministry, he remembered what motivated and drove him through challenges small and great.