謂水雖小，長流則能穿石。證果雖難，勤行精進，則亦得達也。此說出遺教經。
A little water or "dripping water penetrates stone"; the reward of the religious life, though difficult to attain, yields to persistent effort.
一小水穿石 又作滴水穿石。為策勵人勤行精進之語。謂證果雖難，然若能勤行精進，持之以恆，則亦可到達；如滴水雖小，常流不息，亦能穿透堅石。p1228