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The method of selecting messengers varied across different Thracian groups and time periods. Herodotus describes one approach: every fourth year, the Getae chose a messenger by lot. Casting lots removed individual responsibility for the selection—fate decided who would go, not human preference or political maneuvering. The randomness also ensured that eventually everyone might be chosen, distributing the honor (or burden) across the community rather than concentrating it on specific families or classes.
Other sources suggest different selection criteria. Voluntary candidates might step forward, particularly older warriors past their fighting prime who sought honorable death or individuals with specific reasons for wanting to contact Zalmoxis. Someone suffering terminal illness might volunteer, transforming inevitable death into meaningful service. A person with urgent personal question for the god might offer themselves as messenger, ensuring their own query would be answered even if community messages took priority.
The chosen individual underwent preparation period before the actual death. This preparation included ritual purification—bathing in sacred springs, fasting to empty the body of ordinary food, abstaining from sexual activity to concentrate vital energy. The candidate might spend time in isolation, meditating on the messages they would carry, memorizing precisely what they were to communicate. Mental clarity was essential—the messenger had to arrive in the underground realm with full memory intact, capable of immediately seeking Zalmoxis and delivering the communications without confusion or error.
The community treated the chosen messenger with special respect during this preparation period. They were already transitioning toward sacred status, already partially separated from ordinary life. Their needs were met without question, their requests granted where possible, their final wishes honored. This treatment reflected both practical consideration (a resentful messenger might deliberately fail in their duty) and theological understanding (one who would soon join the divine realm deserved reverence).
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