10. Attend closely to the catechisings, and though we should prolong our discourse, let not thy mind be wearied out. For thou art receiving armour against the adverse power, armour against heresies, against Jews, and Samaritans, and Gentiles. Thou hast many enemies; take to thee many darts, for thou hast many to hurl them at: and thou hast need to learn how to strike down the Greek, how to contend against heretic, against Jew and Samaritan. And the armour is ready, and most ready the sword of the Spirit: but thou also must stretch forth thy right hand with good resolution, that thou mayest war the Lord’s warfare, and overcome adverse powers, and become invincible against every heretical attempt.