This embodies the idea that gender is manifested in everything. This does not relate explicitly to the commonly understood notion of sex, but rather "to beget; to procreate, to generate, to create, or to produce..." in general.
Gender is manifested as the Masculine and Feminine principles and manifests itself on all planes.
Mental Gender is described as a Hermetic concept which relates to the masculine and feminine principles. It does not refer to someone's physical sex, nor does it suggest that someone of a certain physical sex necessarily has a matching mental gender. Ideally, one wants to have a balanced mental gender.
The concept put forth in The Kybalion states that gender exists on all planes of existence (Physical, Mental, and Spiritual), and represents different aspects on different planes. It is also stated that everything and everyone has these two elements or principles.
The Masculine principle is always in the direction of giving out or expressing and contents itself with the "Will" in its varied phases.
The Feminine principle is always in the direction of receiving impressions and has a much more varied field of operation than the Masculine. The Feminine conducts the work of generating new thoughts, concepts, and ideas, including the work of the imagination.
It is said that there must be a balance in these two forces. Without the Feminine, the Masculine is apt to act without restraint, order, or reason, resulting in chaos. The Feminine alone, on the other hand, is apt to constantly reflect and fail to actually do anything, resulting in stagnation. With both the Masculine and Feminine working in conjunction, there is thoughtful action that breeds success, which points out that both the Feminine and the Masculine fulfill each other.
Gender is manifested as the Masculine and Feminine principles and manifests itself on all planes.
Mental Gender is described as a Hermetic concept which relates to the masculine and feminine principles. It does not refer to someone's physical sex, nor does it suggest that someone of a certain physical sex necessarily has a matching mental gender. Ideally, one wants to have a balanced mental gender.
The concept put forth in The Kybalion states that gender exists on all planes of existence (Physical, Mental, and Spiritual), and represents different aspects on different planes. It is also stated that everything and everyone has these two elements or principles.

The Feminine principle is always in the direction of receiving impressions and has a much more varied field of operation than the Masculine. The Feminine conducts the work of generating new thoughts, concepts, and ideas, including the work of the imagination.
It is said that there must be a balance in these two forces. Without the Feminine, the Masculine is apt to act without restraint, order, or reason, resulting in chaos. The Feminine alone, on the other hand, is apt to constantly reflect and fail to actually do anything, resulting in stagnation. With both the Masculine and Feminine working in conjunction, there is thoughtful action that breeds success, which points out that both the Feminine and the Masculine fulfill each other.