十不二門指要鈔 2.24

2.24

答：「如身兩臂雖與身連，臂自未合，為防此計，故云亦如波水。有本云，亦無波水者，既不成諭，此定訛也。」

Answer: "Just as the two arms of a body, though connected to the body, are not merged with each other, to guard against this notion [the text] says, 'likewise like waves and water.' A certain version reads, 'likewise without waves and water'; since that fails to form an analogy, it is definitely an error."