The symbol of the High Priestess is one of the most silent and inscrutable cards in the deck, but we may be able to discern a little about her by her position on the tree of life. She has the path from Tiphareth to Kether. This is one of the most significant paths as it is the route from the heart to the crown and bypasses some of the more difficult routes to enlightenment. We can see from the pillars of the Temple in the Rider-Waite symbolism, and from the vault behind her legs in Thoth that this is a card of initiation and may symbolize the final initiation needed to master the Universe.
This is the Lady of Space. The geometry of the Crowley card is intended to show that she is master of the fabric of space and time and her initiation confers great power. The gifts at her feet, show the dynamic whirling and spiral forms of this fabric and also give the key to what is needed to procure this initiation, it is giving up the Universe itself. She controls space and matter and all the items acquired by the initiate, even including the body itself, must be freely offered to the Goddess of space and time, in order to break through the wall that separates the core of individual consciousness from the Godhead.
Her bow (an attribution of Diana, and also her musical instrument) and her crown reinforce the idea that this card is connected to the moon, and that is one of her attributions. This idea of the Lunar also connects her to the Universal menstruum of the Star. The camel in the Crowley card is a little more difficult to unpack but implies a couple more ideas. In one sense, the camel is the body that takes one across the desert of existence, and is therefore offered up, it has another hidden deeper meaning related to Kundalini though. The color of the camel is also suggestive of this. It is very subtly implied that the sexual practice of sperm retention, and withholding of orgasm can drive the vehicle of consciousness up the spine, this only becomes clear through the symbolism of other cards, and we will return to it later, but the tantric practice of orgasm control is central to the path of enlightenment suggested by the tarot.
Orgasm control is only the early practice implied by the card however, and the later full initiation, must be accomplished by meditation. Only through regular practice of deep and intense meditation can we gain enough control of the physical to be able to offer it up in the first place. The body will resist and bind the consciousness for fear of its own survival, but it is possible to completely release the physical body in mind, and travel upward into higher dimensions where 4-dimensional bodies are not allowed. We are then free to return to the physical and the body will be fine and better rested when we return.
In conclusion for this symbol then, as we can begin to see, the deeper meanings of the tarot symbols imply practices, and offer specific rewards for these spiritual acts. The tarot is a workbook, and a holy map, and meant to show the practitioner how to conquer this reality and achieve enlightenment. This path does not require the asceticism of a monk, and actually embraces things like sex and tantra. Later cards will expand on practices and techniques, but the archetypes the cards represent act as guardians of each of the paths. It is not enough to have an intellectual knowledge of the meanings, only through practices can we pass each gate. For this path it is required that the practitioner has already achieved the position of Tiphareth and opened the heart chakra, but the early technique of orgasm control, can start the upward journey by forcing the consciousness to enter the base of the spine. Start your practice, and eventually you can attempt your offering to the Goddess of space and time.