Arthashastra
"परुष मुक्तो हि तेजस्वी तेजसा प्रत्यारोहति ॥
When a man of spirit is addressed with harshness, he surely fights back with his own inner power.
english translation
"paruSa mukto hi tejasvI tejasA pratyArohati ॥
hk transliteration by Sanscript