1. Scholars of the highest class, when they hear about the Tao, 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 fit to be the Tao.

2. Therefore the sentence-makers have thus expressed themselves:--

'The Tao, when brightest seen, seems light to lack;
Who progress in it makes, seems drawing back;
Its even way is like a rugged track.
Its highest virtue ............