Resentful wrathful, not accepting what is for his good and of a vain disposition, Duryodhana should not be spoken to in harsh terms. He should be treated with courtesy.
अमर्षी जातसंरम्भः श्रेयोद्वेषी महामनाः। नोग्रं दुर्योधनो वाच्यः साम्नैवैनं समाचरेः॥