1. Tears help us see.
Starting with the most basic function of tears, they enable us to see. Literally. Tears not only lubricate our eyeballs and eyelids, they also prevent dehydration of our various mucous membranes. No lubrication, no eyesight. Writes Bergman: “Without tears, life would be drastically different for humans — in the short run enormously uncomfortable, and in the long run eyesight would be blocked out altogether.”