(Latin: re, back; velum, veil)
Christ, in His own person, was a revelation of God to mankind:
A drawing aside of the veil, disclosing what is hidden, as the unveiling of a statue.
Divine revelation discloses things about God which otherwise we should not know, or know imperfectly only.
Revelation is the basis of supernatural religion, of knowledge of God and divine things which is above unaided reason, or which, though attainable by reason, becomes known in a way that is outside the course of nature.
"All things are delivered to Me by My Father. And no one knoweth who the Son is, but the Father: and who the Father is, but the Son and to whom the Son will reveal Him." (Luke 10)
"I am the Way, and the Truth, and the Life. No man cometh to the Father, but by Me ...he that seeth Me, seeth the Father also." (John 14)
Christ emphasizes the fact that He is a revealer of Divine truth when He says:
"My doctrine is not Mine, but His that sent Me." ( John 7)
Christ is both God and man.
As man, He was the Ambassador of His Eternal Father; as God, He and the Father are equal in all things.
In order that His doctrine might be accepted as Divine revelation, He confirmed it by Divine sanction:
"the works themselves which I do, give testimony of Me, that the Father hath sent Me" (John 5)
Hence Saint Paul declared:
"For I give you to understand, brethren, that the gospel which was preached by me is not according to man.
For neither did I receive it of man; nor did I learn it but by the revelation of Jesus Christ." (Galatians 1)
From the beginning God revealed Himself to our first parents; later on to the patriarchs, to Moses, and to the Prophets; lastly through His only-begotten Son, Jesus Christ, and the Apostles, this, the Christian revelation, is the last, under which all men must work out their salvation until the end of time.
New Catholic Dictionary