**Mediumship development** is the process of awakening and refining the spiritual faculties that allow an individual to perceive and communicate with higher realms of consciousness. In *A Brief Course in Mediumship*, George Winslow Plummer—writing under the Rosicrucian pseudonym Khei F.R.C.—offers a detailed and ethical roadmap for those pursuing this path. Unlike sensationalist approaches, Plummer’s teachings are grounded in spiritual responsibility, personal growth, and disciplined practice.
This guide explores essential techniques and principles for effective and safe mediumship development based on Rosicrucian philosophy.

Understanding the Nature of Mediumship

Plummer categorizes mediumship into two core types:

Conscious (Voluntary) Mediumship – The practitioner retains awareness, making it easier to assess the integrity of the communication.
Unconscious (Involuntary) Mediumship – The medium enters a trance and allows external entities to communicate through them, often without memory of the experience.

While both forms can yield results, conscious mediumship is recommended for beginners due to its greater control and safety.

Core Techniques for Mediumship Development

Plummer presents several foundational practices for cultivating mediumistic abilities. These time-tested methods are intended to enhance spiritual sensitivity, ethical discernment, and communicative clarity.

1. Daily Meditation and Centering

Regular meditation is the cornerstone of mediumship development. Plummer recommends:

Practicing deep breathing and focused attention
Visualizing a sphere of white or violet light surrounding the body
Silently affirming one's intent to connect only with benevolent spiritual influences

Meditation enhances spiritual receptivity while helping the medium remain grounded.

2. Psychometry Practice

Psychometry involves holding an object and intuitively perceiving its history or emotional residue. To begin:

Choose a small personal item, such as a ring or key
Sit quietly and allow impressions—images, emotions, words—to arise
Record your insights in a journal for later verification

This technique sharpens intuitive perception and builds confidence in subtle sensing.

3. Development of Clairvoyance and Clairaudience

Clairvoyance (clear seeing) and clairaudience (clear hearing) are refined through:

Visualization exercises (e.g., imagining symbols or scenes in vivid detail)
Listening in silence for inner sounds or voices with discernment
Maintaining a dream journal to note spontaneous psychic impressions

Plummer encourages the gradual training of the inner senses, never forcing phenomena.

4. Entering Controlled Trance States

Controlled trance states enable deeper spiritual communication. To do this safely:

Begin with a protected meditation space
Use progressive muscle relaxation to ease into a receptive state
Set clear intentions (e.g., “I invite only high-vibration teachers of light”)

Emerging from trance, always ground yourself through movement, hydration, and reflection.

5. Ethical Grounding and Self-Examination

Perhaps most crucially, Plummer stresses moral preparation. Key ethical practices include:

Developing virtues such as humility, honesty, and compassion
Engaging in regular self-reflection to examine motives and desires
Avoiding the use of mediumship for entertainment or personal gain

According to Rosicrucian philosophy, spiritual purity determines the quality of the medium’s connections.

Rosicrucian Principles in Mediumship

Mediumship development is not just a technical pursuit—it is a spiritual path. Plummer integrates the following Rosicrucian teachings:

Inner Alchemy: Mediumship must support the transformation of the soul through ethical living and self-knowledge.
Universal Laws: Aligning with spiritual laws, such as cause and effect and the law of attraction, protects the medium and deepens their practice.
Service to Humanity: All mediumistic work should ultimately uplift and aid others.

Final Thoughts on Mediumship Development

Plummer’s A Brief Course in Mediumship offers a balanced and disciplined guide for spiritual seekers ready to explore the subtle worlds. Through daily meditation, focused exercises, and ethical alignment, anyone can begin the journey of mediumship development with integrity and purpose.

Whether you're a beginner or an experienced practitioner, Plummer's work remains a valuable resource for safe, effective, and spiritually sound mediumship.

Unlocking Mediumship Development: Rosicrucian Techniques for Spiritual Growth