The tongue must be sanctified by the repetition of the Names of the
Lord. It must also be used to use sweet expressions which will
spread contentment and joy. Be very careful about your speech.
Animals have horns, insects have stings, beasts have claws and fangs,
but man's biggest weapon of offence is his tongue. The wounds
that the tongue can inflict can scarcely be healed; they fester in the
heart for long. They are more capable of damage than even an
atom bomb. The name has much efficacy. Use the tongue to
repeat the Name of the Lord and His attributes.
- Divine Discourse,
July 29, 1964.