At the start of our evolutionary journey as evolving spirits, we are created out of and as a part of our Creator's own Being; we are particles of His own Spirit and Thought Force. We are birthed in "waves", small groups of a dozen or so souls created at the same moment in time. The individual members of these small groups remain linked throughout their evolutionary cycle as soulmates, incarnating together in the denser worlds as life-partners or friends, quite often reincarnating over and over as part of an extended family.
Prior to its downward descent into matter, each soul is split into two separate halves: a negative and a positive polarity - female and male. These two eternally joined souls are called twin souls.
Each individual twin-soul is endowed with a predominantly male or female polarity, each acting as a balancing force to the other. This inherent division into two opposite but magnetically attractive polarities provides the necessary impetus towards a later re-unification of the two souls. It also promotes a desire within individual souls to seek ultimate unity with all other souls and thus a return to the Unity of the Godhead.
As their evolution progresses, each of the twin-souls gradually develops a greater balance between the two polarities or genders. Sometimes souls will switch genders for an incarnation in order to learn the qualities of the other polarity; this explains the varying difficulties of sexual identity which many people experience on Earth during those incarnations when they are inhabiting a body of an opposite and unaccustomed gender.
As the twin souls approach the end of their evolutionary journey they will have learnt to balance the positive out-going/forceful and the negative receptive/nurturing qualities of their two polarities. In this way each becomes an androgenous (male/female) Being, though they will both continue to retain for some time a certain element of their original polarity. They are thus re-united with one another at the level of the Godhead as close halves of a single spirit, now as totally balanced beings, but each bearing the additional depth of understanding contained within the female or male characteristics.
When one twin-soul chooses to incarnate on Earth at the dense physical level to learn the harsh and difficult lessons of this planet, the other usually remains behind on a higher plane in order to provide a spiritual connection and assistance from a more elevated standpoint. Nevertheless there are occasions, such as during an important joint mission on Earth, when twin souls arrange to meet and share an Earth incarnation together. Unless they choose to be born as close relatives or twins, the time and place of their first meeting on the dense physical level is always pre-arranged in the Higher Spheres before incarnating. Such reunions of love at first sight touch a fundamental note of human longing and feature in many of Earth's great love stories.
Even when we may not be destined to meet our twin soul here on Earth, it is likely that some of our soul-mates, members of our original soul group, will be those with whom we are closely associated as family or friends during Earth incarnations.
Before the soul becomes split as twin souls, a portion of the still-unified soul known as the Higher-Self remains on the High Spiritual Realms nearest to the Godhead. The duty of this higher-self is to accumulate and record all the evolutionary experiences gained by the two evolving twin souls, and where possible, to transmit this stored knowledge back down to them as an inner voice of conscience, to assist them in taking the courses appropriate for their further development.
The two twin souls thus share a common higher-self residing on the High Spiritual Realms near to the Godhead. The great Masters stress this connection in their teachings, together with its implication that we can, with intent and suitable training, obtain access to all the highest spiritual knowledge available in the Cosmos by turning inwards in quiet contemplation and connecting with our higher-self.
The higher-self also provides each of its twin souls with a continuity of skills between incarnations. This continuity of development and attainment may explain why some people are born with exceptional natural talents, in the field of healing or science perhaps, or as musical child-prodigies.