Not to converse with a man worthy of conversation is to waste the man. To converse with a man not worthy of conversation is to waste words. The wise waste neither men nor words.
The Master said, “What a worthy man was Yan Hui! Living in a narrow alley, subsisting upon meager bits of rice and water—other people could not have borne such hardship, and yet it never spoiled Hui’s joy. What a worthy man was Hui!” (Analects 6.11)
When a man comes to me, I accept him at his best, not at his worst. Why make so much ado? When a man washes his hands before paying a visit, and you receive him in that clean state, you do not thereby stand surety for his always having been clean in the past.