Analysis reveals Jesus' metaphor emphasizes the intelligence and maturity expected from disciples as Gospel preachers.
Jesus’ “salt of the earth” saying referred to salt losing its preservative properties and becoming susceptible to spoiling. It functioned as an idiom metaphorically representing the intelligence and maturity that the disciples were expected to display as exemplary preachers of the Gospel.
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Norman Simón Rodríguez Cano (2025) studied this question.
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