The "secret" teaching--the elite, occult way of evil . . . to watch for, to avoid . . . is the esoteric doctrine of the unifying of opposites. "Unity" is a big word with them. . . . Unifying, "making peace" between your "dark" and "light" natures--synthesizing, collating them. . . .
It is the sure way of evil. It abhors the exclusivity of The Way of Jesus Christ. You will even see so-called "Christians" being drawn into the subtle demonic doctrine as they start to de-emphasize the Person and Deity and eminance of JESUS CHRIST . . . and will then start emphasizing something more like the "Christ principle" . . . as if the Person--the God/man deity in flesh Yeshuah, Jesus is not so important as the "principle" . . . the "type" that he represented. . . .
They will also start to despise the Bible in devious, subtle ways, allowing it only for certain proof text expediencies . . . but they reject it as the infallible Word of God.
They are drawn to "spiritual laws" . . . especially the "law of attraction" in its many disguised forms, which is often nothing more than sorcery and necromancy. . . .
But most blasphemous of all, surely, is the attempt to "unify" "dark and light" . . . as if they are but two sides of the same coin--the "coin" in this case being the idol, the false god of "enlightenment" or "illumination" through the blending of opposites in a supposed "oneness" whole. . . .
The Process Church--an offshoot of diabolical, Crowley-istic Scientology . . . is an example of this Gnostic path, where they attempt to unify, address, imbibe . . . the 4 gods Jehovah, Lucifer, Satan & Christ. As is always the case in all these misguided, demonically deceived attempts at "higher teaching" . . . what ends up happening is that Lucifer/Satan is all who gets worshiped and served as Jesus and the Word of God--the One True & Living God . . . becomes increasingly despised and warred against.
Beware the subtle ways this teaching is craftily entering the Church and purported believers--through "Christian yoga" . . . "meditation/visualization" . . . "law of attraction" . . . "7 Spiritual laws" etc.
It is the way to destruction and enslavement to the devil, plain and sure. . . .