先生曰：「我辈致知，只是各随分限所及。今日良知见在如此，只随今日所知扩充到底，明日良知又有开悟，便从明日所知扩充到底，如此方是精一功夫。与人论学，亦须随人分限所及。如树有这些萌芽，只把这些水去灌慨，萌芽再长，便又加水，自拱把以至合抱，灌溉之功皆是随其分限所及。若些小萌芽，有一桶水在，尽要倾上，便浸壤他了。」
先生说：「我们致知，只是各随分量所及。今日良知见得如此，就随今日所知扩充到底；明日良知又有开悟，便从明日所知扩充到底：这才是精一的功夫。与人论学，也须随人的分量所及。就像树有这么些萌芽，只拿这些水去浇灌；萌芽再长，便再加水，从拱把到合抱，灌溉之功都是随其分量所及。若些小萌芽，有一桶水在，全要倾上去，便把它浸坏了。」
The Master said: 'Our extension of knowledge goes only as far as each man's measure reaches. Today innate knowledge shows thus: extend today's knowing to the full; tomorrow brings new opening: extend tomorrow's to the full — that is refinement-unity. In discussing learning, likewise follow the man's measure. A tree with so much sprout: water it with just so much; as it grows, add more — from fist to embrace, the watering ever follows the measure. A tiny sprout with a full bucket poured over it is drowned and ruined.'