The following Psalm was a revelation of Christ revealed to the heart of David by the Spirit of Truth approximately 600 years before Christ came. The deep things of God in the Old Testament were foretold and recorded by the Prophets to confirm the truth about the promised Messiah. Prophets who wrote the Bible were holy men of God moved and inspired by the Holy Ghost sent down from Heaven. All Old Testament Prophets had revelation of Christ, the promised Messiah. Prophecy proves the truth about Christ who came the first time (according to prophecy) and who will also come again a second time (according to prophecy). The following prophecy in the entire chapter of Psalm 1 is a beautiful picture of the promised Messiah. Psalm 1 was written 600 years before Christ actually walked among men on the Earth.
Blessed is the man (Jesus) that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful (Jesus was sinless). But his delight is in the law of the LORD; and in his law doth he meditate day and night. (Jesus was the author of Law given to Israel, He was born under Law, and lived under Law, and kept perfect Law to the letter.) And he shall be like a tree planted by the rivers of water, that bringeth forth his fruit in his season; his leaf also shall not wither; and whatsoever he doeth shall prosper. (This speaks of the restoration of all things when Christ returns to establish His Kingdom in Jerusalem.) The ungodly are not so: but are like the chaff which the wind driveth away. Therefore the ungodly shall not stand in the judgment, nor sinners in the congregation of the righteous. For the LORD knoweth the way of the righteous: but the way of the ungodly shall perish. (Jesus is the Judge of all men and Judgment will take place when Christ returns again the second time and steps down on the Mount of Olives according to Zechariah.)