Scholars of the highest class, when they hear about the Dao, earnestly carry it into practice. Scholars of the middle class, when they have heard about it, seem now to keep it and now to lose it. Scholars of the lowest class, when they have heard about it, laugh greatly at it. If it were not (thus) laughed at, it would not be the Dao. Therefore the sentence-makers have thus expressed themselves:—'The Dao, when brightest, seems obscure; the Dao, when advancing, seems to retire; the Dao, when at its smoothest, seems uneven; highest virtue from the valley (of its lowliness) comes; the greatest pureness seems to feel some stain; the abundant virtue seems to be deficient; the virtue's establishment seems to be stealthy and mean...'
The superior scholar hears of the Dao and diligently practices it. Describes the reactions of different levels of people to the Dao and its counter-intuitive traits.