Water symbolizes Torah (Talmud)

The comparison is from Isaiah: " Everyone... thirsts for water (Isaiah 55:1)." The Talmud, Baba Kama 82a, explains this as spiritual thirst, all who seek it should drink of Torah's refreshing teachings.

(1) Just as rain water comes down in drops and forms rivers, so with the Torah; one studies a bit today and some more tomorrow, until in time becomes like a flowing stream.

(2) Just as water has no taste unless one is thirsty, so too, Torah is best appreciated through great effort and yearning.

(3) Just as water leaves a high place and flows to a low one, so too, Torah leaves one whose spirit is proud and remains with one whose spirit is humble.

(4)  Water is a great equalizer, no matter your station or class - all can drink water. So, too - a scholar should not be ashamed to say to a simpler fellow, 'Teach me a chapter, a verse or a letter'.

(5) Just as water is a source of life for the world, as it says, A fountain of gardens, a well of living waters (Song of Songs 4:15), so the Torah is a source of life for the world.

(6) Just as water restores the soul, so does the Torah.

(7) Just as water is cleansing, the words of Torah are purifying.

- Song of Songs (Midrash) Rabbah