注維摩詰經 6.300

6.300

肇曰：仁者不知所以轉而轉為女身，眾女亦不知所以轉而為女也。若仁者無心於為女而不能轉女身者，則眾女亦然不能自轉。如何勸人轉女身乎？此明女雖無定相，而因緣所成，不得自在轉也。

[Seng]zhao says: You, good sir, did not know how you were transformed, yet were transformed into a female body; all women also do not know how they were transformed, yet are women. If you had no mind to become a woman and yet could not transform your female body, then all women likewise cannot transform themselves. Why urge others to transform their female bodies? This makes clear that although female form has no determinate mark, it is produced through causes and conditions, and one cannot freely transform it.