Atheism is simply lack of belief in deity. Laveyan Satanism is a hodge-podge of Enlightenment rationalism, Medieval "Satanist" deviancy, Nietzsche, misinterpreted Aleister Crowley, Rand Objectivism and modern occultism. If I left anything out, I'm sorry. Laveyan Satanism doesn't posit a creed for living without "god" or a "higher power." Laveyan Satanism pretends to be what people would believe in if they didn't have any values from religion, i.e. selfishness, egoism. The fact is that people are not naturally selfish creatures out for their own self-satisfaction. People can be very altruistic and decent people without any religious upbringing. Of course a Laveyan Satanist could be very altruistic and decent, provided that they did nice things just because doing nice things gives self-satisfaction. I don't disagree with Satanism per se because I profess a form of Satanism that goes back further than Laveyan Satanism. Satan has always been the archetypal deviant or rebel. According to Aleister Crowley every man is his own god.
"Every man and every woman is a star. Every number is infinite; there is no difference." Liber Al Legis, The Book of the Law
"I believe in one secret and ineffable LORD; and in one Star in the Company of Stars of whose fire we are created" Creed of Ecclesia Gnostica Catholica
"I am the Snake that giveth Knowledge & Delight and bright glory, and stir the hearts of men with drunkenness. To worship me take wine and strange drugs whereof I will tell my prophet, & be drunk thereof! They shall not harm ye at all. It is a lie, this folly against self. The exposure of innocence is a lie. Be strong, o man! lust, enjoy all things of sense and rapture: fear not that any God shall deny thee for this." Liber Al Legis, The Book of the Law
I think that every man/woman/child should feel free to pursue whatever they feel is the truth and to enjoy whatever lifestyle they are comfortable with. I think that conventional religion is a lie that has far too long been accepted. People need to form creeds based on what it means to be people rather than what religions tell them. God should be seen in terms of Infinite Intelligence or Cosmic Consciousness.
“The true name of Satan, the Kabalists say, is that of Yahveh reversed; for Satan is not a black God, but the negation of God. The Devil is the personification of Atheism or Idolatry. For the Initiates, this is not a person, but a force, created for good, but which may serve for evil. It is the instrument of Liberty or free will. They represent this Force, which presides over the physical generation, under the mythologic and horned form of the God Pan; thence the he-goat of the Sabbat, brother of the Ancient Serpent, and the light bearer or Phosphor, of which the poets have made the false Lucifer of the legend”. Albert Pike, Morals and Dogma
Thelema 101 at Thelema 101 Sinagogue of SatanCouncil for Secular HumanismNational Spiritualist Association of Churches