We should purge our words from “idle fancies and worldly desires” and our deeds from “craftiness and suspicion”

Take heed that your words be purged from idle fancies and worldly desires and your deeds be cleansed from craftiness and suspicion. (Bahá'u'lláh, Tablets of Baha'u'lláh revealed after the Kitáb-i-Aqdas)