The well was in the merit of Miriam, the pillar of cloud in the merit of Aharon, and the manna in the merit of Moshe. The manna corresponds to Torah, the cloud to worship, and the well to kindness. Thus, in the merit of Miriam, the well sustained the Jewish people with water in the wilderness. Water symbolizes life, since nothing can grow without water. The nurturing quality of water associated with Miriam is found in all womankind.
Women keep the Jewish people alive.
Without the perpetual kindness of women pouring out like a bottomless well, nothing would be able to be conceived, born, or kept alive. The well signifies the arousal of the lower, -the water below the earth which rise up to the above. A woman desires her man, because, she yearns to be raised up through him. By arousing the love of the Jewish people for Hashem, she manifested this power of the well to rise. The desire to always grow, flourish, and flow is clearly expressed among women today.