One should treat another as the latter does him. A deceitful person should be thwarted with deceit, while an honest man should be treated with honesty.
यस्मिन् यथा वर्तते यो मनुर्घ्य स्तस्मिंस्तथा वर्तितव्यं स धर्मः। मायाचारो मायया बाधितव्यः साध्वाचारः साधुना प्रत्युपेयः॥