Basilides, then, represents that form of Gnosticism that is closest to Persian dualism in its final form.
From most of the other Gnostic sects, with the exception perhaps of the JewishChristian Gnosticism, he is distinguished by the fact that with him the figure of the fallen female god (Sophia Achamoth), and, in general, the idea of a fall within the godhead is entirely wanting.
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He holds that freedom is the inalienable prerogative of the finite spirit; and this is the second point that distinguishes his theology from the heretical Gnosticism.
The foundation of the system is obviously to be sought in Gnosticism, and more particularly in the older type of that doctrine (known from the serpent symbol as Ophite or Naassene) which obtained in Mesopotamia and Further Asia generally.