Revelation

Revelation (Greek apokalupsis ) means “an uncovering,” “an unveiling,” or “a disclosure.” In the NT, this word describes the unveiling of spiritual truth (Rom. 16:25; Gal. 1:12; Eph. 1:17; 3:3), the revealing of the sons of God (Rom. 8:19), Christ’s Incarnation (Luke 2:32), and His glorious appearing at His Second Coming (2 Thess. 1:7; 1 Pet. 1:7). In all its uses, revelation refers to something or someone, once hidden, becoming visible. What this book reveals or unveils is Jesus Christ in glory. Truths about Him and His final victory, that the rest of Scripture merely allude to, become clearly visible through revelation about Jesus Christ (see Historical and Theological Themes). This revelation was given to Him by God the Father, and it was communicated to the apostle John by an angel (1:1).

MacArthur, John F.. The MacArthur Bible Commentary (p. 1989). Thomas Nelson. Kindle Edition.

Unveiling of Spiritual Truth

Romans 16:25 NASB95

Now to Him who is able to establish you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery which has been kept secret for long ages past,

Galatians 1:12 NASB95

For I neither received it from man, nor was I taught it, but I received it through a revelation of Jesus Christ.

Ephesians 1:17 NASB95

that the God of our Lord Jesus Christ, the Father of glory, may give to you a spirit of wisdom and of revelation in the knowledge of Him.

Ephesians 3:3 NASB95

that by revelation there was made known to me the mystery, as I wrote before in brief.

Revealing of the Sons of God

Romans 8:19 NASB95

For the anxious longing of the creation waits eagerly for the revealing of the sons of God.

Christ’s Incarnation

Luke 2:32 NASB95

A Light of revelation to the Gentiles, And the glory of Your people Israel.”

His Glorious Appearing at His 2nd Coming

2 Thessalonians 1:7 NASB95

and to give relief to you who are afflicted and to us as well when the Lord Jesus will be revealed from heaven with His mighty angels in flaming fire,

1 Peter 1:7 NASB95

so that the proof of your faith, being more precious than gold which is perishable, even though tested by fire, may be found to result in praise and glory and honor at the revelation of Jesus Christ;

Revelation was written by John the Apostle not the Baptist, He wrote the book of John and 3 epistles He wrote Revelation while on exiled on the Island of Patmos. He was exiled there for preaching the Gospel of Christ.

Look at Chapter 2:

2:2 who say they are apostles. The Ephesian church exercised spiritual discernment. It knew how to evaluate those who claimed spiritual leadership by their doctrine and behavior (cf. 1 Thess. 5:20, 21).

MacArthur, John F.. The MacArthur Bible Commentary (pp. 1995-1996). Thomas Nelson. Kindle Edition.