The Disciples Were Absorbed In A Discussion Of Lao-tzu's Dictum: "those Who Know, Do Not Say; Those Who Say, Do Not Know." When The Master Entered, They Asked Him What The Words Meant. Said The Master, "which Of You Knows The Fragrance Of A Rose?" All Of Them Indicated That They Knew. Then He Said, "put It Into Words." All Of Them Were Silent.