Msgr. Charles Pope of the Archdiocese of Washington, DC published a great post on his blog, entitled The Many Disguises of Satan. I think you should read it. Here's an excerpt:
Read it all here.He [Satan] claims to offer us freedom and autonomy from an unreasonable God and Church, liberation from rules and being “told what to do.” He cloaks himself in the false righteousness of being “tolerant” and “not judging others.” He exalts us by telling us we have finally come of age and can disregard the “hang-ups” and “repression” our ancestors had of sex and pleasure. He flatters us by extolling our scientific knowledge and inflates us by equating it with wisdom and moral superiority over our “primitive” fore-bearers.