| Xue Ji: |
The ancients in prosecuting their learning compared different' things and traced the analogies between them. The drum has no special relation to any of the musical notes; but without it they cannot be harmonised. Water has no particular relation to any of the five colours; but without it they cannot be displayed. Learning has no particular relation to any of the five senses; but without it they cannot be regulated. A teacher has no special relation to the five degrees of mourning; but without his help they cannot be worn as they ought to be. |