Jews have always taken dreams seriously. The Talmud devotes pages to their meaning. But not every dream comes with an interpretation, and not every dreamer has a Joseph nearby to decode the stalks of grain and the seven thin cows. The rabbis wrote a prayer for those mornings when you wake shaken and unsure.
The prayer is said during the priestly blessing on festivals. It goes like this:
Sovereign of the Universe, I am Yours, and my dreams are Yours. I have dreamed a dream, but I do not know what it portendeth. May it be Your will, Lord my God and God of my fathers, that all my dreams concerning myself and concerning all Israel be for my good. Whether I have dreamed concerning myself, or concerning others, or whether others have dreamed concerning me, if they be good, strengthen them and fortify them, that they may be fulfilled in me, as were the dreams of the righteous Joseph.
And if they require healing, heal them as You healed Hezekiah, king of Judah, from his sickness (2 Kings 20:5); as Miriam the prophetess from her leprosy (Numbers 12:13); and Naaman from his leprosy (2 Kings 5:14); as the bitter waters of Marah by the hands of Moses (Exodus 15:25), and the waters of Jericho by the hands of Elisha (2 Kings 2:21). And as You turned the curse of Balaam the son of Beor to a blessing (Numbers 23:11), be pleased to turn all my dreams concerning me and all Israel to a good end. Guard me, let me be acceptable to You, and grant me life. Amen.
This prayer, preserved in Hebraic Literature (1901), is one of the few places in the siddur where a Jew prays directly about the unconscious. It assumes that a dream, like water, can be made sweet if you bring the right hands to it.