The Greek word translated revelation, is Apocalypse. It means literally an unveiling, uncovering, revealing. It can be either removing a veil so something becomes visible, or taking a veil from the future, and disclosing the course of events which will take place.
(Strongs, NASB Dictionary, and Commentary on Revelation.)
In that sense,
The who revealed is Jesus Christ.
The what Jesus reveals/unveils are the events to come.
Source: This revelation started with God the Father and was given to Jesus Christ, the Son, who sent His angel to show these things to John. He wrote them down under the inspiration of the Holy Spirit for us.
Purpose: To inform, prepare, and bless the hearers because the time was near.
Outcome promised: The one who reads this word of prophecy aloud [in the assemblies AMP] will be blessed [happy, to be envied AMP] as well as those who hear and ponder the reading.
4. The Greek word translated as Blessed…
also means happy, to be envied, fortunate, supremely blessed, and well off. (Strong’s Concordance)
Revelation 1:2 seems to imply a specific blessing for those who read this particular prophecy.
Ways I am Blessed:
For I am convinced that nothing can ever separate us from his love. Death can’t, and life can’t. The angels won’t, and all the powers of hell itself cannot keep God’s love away. Our fears for today, our worries about tomorrow, or where we are—high above the sky, or in the deepest ocean—nothing will ever be able to separate us from the love of God demonstrated by our Lord Jesus Christ when he died for us. Romans 8:38-39 NLT
- Holy Spirit: I have the promised gift of the Holy Spirit living inside to help me, and to give me counsel, comfort, wisdom, revelation, and guidance.
- Righteousness: I am the righteousness of God in Christ Jesus. Who I am in Christ
- Grace — God’s unearned and undeserved favor and forgiveness.
- Provision — Through faith in Him, He promised to provide all my needs out of His riches.
I expect the in-depth study of Revelation to bear fruit in my life in the following ways:
- Revelation knowledge of God through His Word, through dreams, through visions, through the Holy Spirit’s guidance, and through other believers.
- More intimate relationship with God through worship and other encounters.
- More trust in God’s plan for my life and the lives of others.
- Better prepared with grace and peace to overcome the resistance we all encounter in pursuit of God and His calling.
Blessed does NOT include fear. One writer points out, “you would think Revelation says there is a blessing for NOT reading it.” Commentary on Revelation
Take to heart (NIV) is rendered keep in several other versions. Keep is a Hebrew idiom.
“…but Mary kept all these things in her heart and thought about them often.” Luke 2:19
Then He (Jesus) went down with them and came to Nazareth and was obedient to them. His mother kept all these things in her heart. Luke 2:51
It usually means remembering, pondering, and treasuring.
The word is used also of remembering as to obey; but this can hardly be appropriate here, for prophecy is not precept.” E. W. Bullinger (I’m not promoting Bullinger here. But understanding the Greek words is a big deal, in my opinion. Others who translate can insert their own theology in subtle ways. We all have our own bias based on past teaching. I do try to read as if for the first time, I know it’s difficult.)
Revelation has important information and teaching. I want to approach it that way, ponder it through means of this study, and ask the Holy Spirit to guide me in understanding what is relevant to my life now and in the future. I also ask the Holy Spirit to cause me to remember as He did with the disciples after the resurrection.