The Greek verb diaseio means to shake thoroughly or violently. In New Testament usage (Luke 3:14) it refers to the practice of soldiers extorting money from civilians through violent intimidation — shaking them down.
John the Baptist's ethical instruction to soldiers ('do not extort money from anyone by threats or by false accusation, and be content with your wages,' Luke 3:14) confronts the structural abuse of military power. The word diaseio — literally 'to shake apart' — vividly captures the terror of armed extortion. John's ethics of military service presuppose neither pacifism (he doesn't tell them to leave the army) nor abuse of power. This ethical grounding in the Gospel's repentance marks John's ministry as socially concrete: true repentance reshapes how power is exercised in every vocation.