I've been studying the principles of The Kybalion, which is as anyone who understands the text would say, a short list of generalizations about the nature of the universe. I also have very briefly analyzed Summum, a contemporary rehashing of The Kybalion and I intuitively agree with its main principle of creation stating that the universe came from nothing and possibility. However, The Kybalion's 7th principle of gender, is meanwhile not holding up to well in my eyes.
Throughout The Kybalion's chapter on the feminine and masculine in its Principle of Gender, it insists they permeate all of nature, yet the only analogies which seems to appear are the differences between positive and negative energy in atoms and the chromosomal difference between a woman and a man. That to me sounds like a rehashing of the principle of polarity (aka principle of opposition) thinly guised as something new. Femininity and masculinity are treated as two polar opposite forces which across all realms of existence (aka dimensions) play roles in creation where the masculinity directs the creation and the femininity does the actual creating.
I believe the 7th principle from The Kybalion, The Principle of Gender, is in fact a mistakenly separated section and in fact is simply a subsection of the 4th section on the Principle of Polarity.
Think about it like this: if you were to shorten the information for the Principle of Gender and categorize it under a different principle, which one would you choose? The principle of mentalism, correspondence, vibration, polarity, rhythm, or cause and effect? Of those, the one that fits the best would be the Principle of Polarity, since all the others at best would only relate if you were talking about the sex that happens between genders, not the genders themselves. Alternatively if you were using the Summum text you might categorize the Principle of Gender under the Principle of Creation.
At the same time, if the whole point of the Principle of Gender was the fact the genders copulate, which is the only thing which seems to permeate all 7 principles in the Kybalion, why are the genders focused on more than the copulation? Genders are already taken care of under the principle of polarity anyway, while copulation is an entirely new principle that is not focused on nearly enough within the Principle of Gender. Why not just call it the Principle of Copulation and focus on the copulation between genders, which would actually make more sense and be a far more legitimate focus for the principle?
Further, if the whole point of the Principle of Gender was the copulation, wouldn't that mean the exact same thing as the Principle of Creation from the new contemporary Summum text since that also focuses on creation? In which case, that would mean the Principle of Creation from Summum arose from the simple semantic misstep of The Kybalion focusing on the genders, which are just another form of polarity, instead of on the copulation itself, which actually serves as a legitimately new principle compared to other previously explored principles in The Kybalion.