I had a dream.
Imagine you are tidying up and you make a stack of books and magazines and papers on a table. The stack is uneven, balanced on an uncertain centre of gravity. You place another book on the top and in the instant you move your hand away to see if the pile will remain stable, you know will not. You know the tower will tilt and the layers of paper will fall and slide across the table on glossy covers. You don't know if it will collapse in a heap or slide across the full length of the table and spill onto the floor, but you know it will fall before you can stop it.
My dream was similar to that feeling of prescience. In my dream I knew the way my tongue rested in my mouth meant it would be bitten when I closed my teeth. I was certain and I was astounded by the power of my certainty. It was a revelation of truth, amazing and awesome. At no time did it cross my mind to move my tongue out of danger or consider not closing my teeth. Instead I just bit my tongue. I woke up, of course. I had bitten my tongue in two places and even drew a little blood. That sort of thing tends to wake me.Dreaming about biting your tongue symbolizes being quiet or containing yourself.