Meet Pan. The early Catholics modeled Lucifer's image after him. For the full story, see below

So, now you fancy me a Satanist?

"The Roman god, Lucifer, was the bearer of light, the spirit of the air, the personification of enlightenment. In Chrisitan [Catholic, actually] mythology he became synonymous with evil..."

-"The Satanic Bible," Pg. 39
"Satan, the chief devil of the western world, was originally an angel whose duty it was to report human delinquencies to God. It was not until the 14th century that he began to be depicted as an evil deity who was part man and part animal, with goat-like horns and hooves. Before Christianity gave him the name Satan, Lucifer, ect., the carnal side of man's nature was governed by the god which was then called Dionysius, or Pan, depicted as a satyr or faun, by the Greeks. Pan was originally the 'good guy,' and symbolized fertility and fecundity."

-"The Satanic Bible," Pg 55-56
"Satan, the accuser, is given the power to afflict but is kept on a leash. In all his evli among men or in nature, Satan is under God's power."

-"The NIV Study Bible, 10th Ann. Ed,"
Pg 726, footnote for verse 1:12
"During the intertestamental period, Jewish literature showed interest in demons and in organized powers of evil opposed to God. These ideas influenced the New Testmament portrayal of Satan, even so, Satan retains much of his old character in the Tempatations. In Revelation, Satan develops into God's absolute enemy The Christian idea of a Satan who is 'prince of evil,' a powerful enemy of God who rules the region of Hell and a host of demons, is really a post- biblical synthesis of characters and concepts. Rabbinic Judaism connected Satan principally with the human temptation to sin, identifying him with the 'crafty' serpent of Genesis 3. In Revelation 20:1-0, Satan is the serpent, but a more malevolent figure."

-"The Complete Bible Handbook," Pg 175
"The devil is a necessary counterpart to such an 'all-powerful and excellent' God. The devil carries out God's judgement, tormenting sinners for all eternity. He is, as King James I called him, 'God's Hangman.'"

-"The Dark Side Of Christian History," Pg. 113
"Nature was instead seen as the realm of the devil. The Church chose the image of Pan, the Greek God of nature, to portray the devil. The horned, hoofed, and goat-legged man had been associated with a number of fertility figures and had preciously been deemed essential to rural well-being. With Pan's guidance, all the mythical creatures of Earth were thought to work in harmony: fairies, elves, and devas. Pan's skill on the pan-pipes was believed to fill the woods and pastures with enchanted music. His name, 'Pan,' meant 'all' and 'bread.' But, particularly after the turn of the millennium when the Church authorized specific portryals of The Devil, the vilified Pan came to evoke terror or 'panic' as the image of Satan."

-"The Dark Side Of Christian History," Pg. 140
"To the orthodox [Christians], neither nature nor physical pleasure were imbued with God's presence; both were of The Devil."

-"The Dark Side Of Christian History," Pg. 152