The Old Testament predicted that Jesus would come, sacrifice Himself as an atonement for sin, and that He would return. The New Testament book of Revelation reminds us (assures us) that He is indeed coming again.
In fact, Revelation 22 quotes Jesus saying (three times) “I am coming quickly.”
“And behold, I am coming quickly. Blessed is he who heeds the words of the prophecy of this book.” Revelation 22:7
“Behold, I am coming quickly, and My reward is with Me, to render to every man according to what he has done.” Revelation 22:12
“Yes, I am coming quickly.” Revelation 22:20
How do we conduct our lives while we wait? Verse 7 says we are to “heed the words of the prophecy of this book.”
In chapter 1, verse 3, John wrote, “Blessed is he who reads and those who hear the words of the prophecy, and heed the things which are written in it, for the time is near.”
While we await His return we are to follow the guidelines of His instruction manual (the Holy Bible). It is helpful to read the books of great theologians, commentaries, Bible notes etc., but the Bible is the Word of God (God speaking directly to us) and we should immerse ourselves daily in its content.
Every true believer should diligently study the Word of God and seek to apply it to his life.