Symbolism, Imagery, Allegory
Of all the things Christine de Pizan values in women, chastity is one of the most important. Many of the insults that men made against women during Christine's time were based on the idea that women were very lusty and always after sex.
This is a totally flipped stereotype from the one that floats around today, where men are perpetually lusty and women mostly put up with sex for the rewards of companionship. Back in the day, men had willpowers of steel and women were horny.
According to Christian morality, lust was a very dirty thing, so Pizan makes arguments for women's virtuous chastity when she writes,
How many valiant and chaste ladies does Holy Scripture mention who chose death rather than transgress against the chastity and purity of their bodies and thoughts? (2.37.1)
If women weren't chaste, reasons de Pizan, then why would the Holy Bible contain so many great stories about women who'd rather die than lose their virginity? Christine de Pizan: 1. Male philosophers: nil.