When you cut and polish a stone, as you grind and rub you do not see it decreasing, yet with time it will be worn away. When you plant a tree and take care of it, you do not see it increase, but in time it gets big.
When you accumulate virtue with continued practice, you do not see the good of it, but in time it will function. If you abandon right and go against truth, you do not see the evil of it, but in time you will perish.
When students fully think this through and put it into practice, they will develop great capacity and emanate a fine reputation. This is the way that has not changed, now or ever.