CASTALIA · A LIVING MAP
A reading of who you are, in conversation with what you live.
A birth chart can offer a map. A life is what happens as we travel: rhythms, relationships, changing bodies, seasons of rest and effort, beginnings and endings. Metheus holds these views together without mistaking one for the other.
Explore the approachTWO WAYS OF SEEING
01 / PROMETHEAN
The Promethean layer begins with a symbolic design system such as Human Design: a birth-based map of patterns, language, and questions for self-inquiry.
It can help someone notice what feels resonant, what invites experimentation, and where a familiar story may be shaping their choices. It is an interpretive lens, not a verdict about who a person must be.
02 / EPIMETHEAN
The Epimethean layer attends to what becomes visible in hindsight and through time: changing rhythms, bodily signals, relationships, responsibilities, and transitions. It can be grounded in physiology—including hormonal and neurochemical processes—while staying clear about what is measured, what is estimated, and what remains interpretation.
It makes room for the particular life behind the map. Rather than asking only “What is my design?”, it also asks “What is happening for me now, and what have I learned from living it?”
THE MEETING POINT
“A pattern can be a useful question.
Your lived experience gets to answer.”
Metheus is not a new authority over a person. It is a way to place a symbolic reading beside the person's own observations, memories, and choices—and leave room for surprise.
THE METHEAN SYSTEM
Metheus keeps the symbolic map and lived records distinct. They meet in a reading, where the person decides what is meaningful.
01 / PROMETHEAN
A source-attributed symbolic design: framework, lineage, calculation, and version.
02 / EPIMETHEAN
What a person chooses to report, observe, or measure across changing timescales.
03 / READING
Selected records and symbolic prompts are shown with their own sources, limits, and uncertainty. The person can add context, disagree, or leave a connection unexplored.
A boundary to keep: Promethean features can shape a reflective question; they do not feed hormone, developmental, or other physiological estimates.
WHAT A LIFE CAN INCLUDE
Hormonal rhythms can shape physiology across menstrual cycles, pregnancy, postpartum life, and menopause. Metheus can make room for cycle dates, symptoms, and relevant clinical or laboratory results when people choose to share them, while distinguishing direct measurements from calendar-based estimates. Neurochemical activity is usually not available as a continuous wearable measurement, so it should not be presented as if a device had measured it.
Sleep and wake timing, light exposure, meals or feeds, activity, temperature, and HRV can be viewed across the day and against a person's own schedule. Their timing may interact; it does not by itself prove cause. For babies, feeding is described through age-appropriate cues and caregiver observation, never adult fasting patterns.
Conception, pregnancy, birth, postpartum life, menopause, illness recovery, grief, caregiving, and other changes may shape what a reading means in context.
Epimethean context can follow development from pregnancy and birth through infancy, childhood, adolescence, adulthood, and aging. For babies, it can center changing sleep and feeding rhythms, growth, sensory and motor exploration, communication, co-regulation, and caregiver connection—always allowing for wide individual variation.
Developmental psychology can help shape learning supports around a person's goals, current task, prior experience, access needs, relationships, and context. A symbolic design may offer a reflective question; it cannot label a fixed learning style or predict ability. For babies, learning begins in responsive interaction and safe exploration, not chart-based expectations.
Someone may choose to note relationship beginnings, commitments, changes in closeness, or when intimacy was shared, then reflect on how those experiences relate to their own hormonal-cycle notes and felt experience over time. This can support personal pattern-finding; it cannot show that hormones caused desire or behavior, predict intimacy, or establish compatibility, consent, or what another person feels.
Journal notes, intentions, and the person's own interpretation help turn information into a conversation—not an automated conclusion about what they should do.
Chosen routines and constrained actions—such as movement, eating patterns, supplements, light, or aroma—can be recorded with intention, timing, and context. Smell, taste, and ingestion stay distinct; any response is recorded separately, and no practice is prescribed from a chart or assumed hormone effect.
A READING IN PRACTICE
Offer the symbolic reading as a lens for reflection, with its source and limits made clear.
Bring in only the signals and life context the person has chosen to share. Show what was observed, over what period, and how complete the information is.
Compare changes with that person's own history. A single reading or measurement is not a pattern, and a pattern alone does not explain its cause.
Offer possibilities and questions. The person decides what fits, what matters, and what action—if any—they want to take.
OUR COMMITMENTS
Different sources stay distinct. Symbolic interpretation, sensor measurement, and personal report are labeled as different kinds of information.
The person sets the context. Intimate details and relationship milestones are optional and private. No one needs to track a cycle, wear a device, disclose a transition, or accept a reading. Records should be entered only by the person they concern, with care around another person's privacy.
Signals are not diagnoses. Temperature, HRV, sleep, hormone results, and calendar estimates each have limits and can be affected by many things. A person's notes may reveal a perceived relationship between cycle and intimacy, but that is not proof of causation. Metheus does not infer a person's hormones or neurochemistry from mood, behavior, or a wearable proxy, or infer illness, fertility, identity, or destiny from them.
Privacy is part of care. Personal data should be minimized, protected, and kept under the person's control, with clear choices about storage and sharing.
Many lives belong here. Bodies and life courses vary. Menstruation, pregnancy, parenting, menopause, and other transitions are never assumed to apply to everyone.
Development is not a score. Age-linked milestones can help organize observation, but children vary and a reflective reading is not developmental screening. Health or developmental concerns belong with a pediatric or developmental professional.
A WORK IN PROGRESS
Metheus is an early exploration of a time-aware systems model: a symbolic map in conversation with physiology, development, daily and feeding rhythms, relationships, circumstances, and lived experience. Wearable integrations and personal data collection are not yet implemented.
Explore the Metheus systems model →
Explore the Methean model core specification →
Explore the subject index and resource contracts →
Explore the private birth-chart input contract →
Explore the versioned symbolic map contract →
Explore resource resolution and separate consent checks →
View a synthetic consent-scoped symbolic reading →
Read the critical review and development priorities →
See what Metheus can represent and execute today →
Explore the ontology and observation model →
Explore the reading grammar and examples →
Explore the first executable rhythm summaries →
Explore the hormone and endocrine-signal reference →
Explore what Metheus can measure →
Explore the rhythm system model →
Explore Promethean and Epimethean phase names →
Explore how symbolic design and lived physiology meet →
Explore the behavior and chosen-change layer →
Explore the sensory, aroma, and flavor layer →
Explore developmental psychology and learning →
Explore privacy, consent, and data stewardship →
Metheus is for reflection and self-inquiry. It is not medical advice and does not replace professional care.