Whether pain or sorrow is assuaged by tears?

Objections

Objection 1 : It would seem that tears do not assuage sorrow. Because no effect diminishes its cause. But tears or groans are an effect of sorrow. Therefore they do not diminish sorrow.
Objection 2 : Further, just as tears or groans are an effect of sorrow, so laughter is an effect of joy. But laughter does not lessen joy. Therefore tears do not lessen sorrow.
Objection 3 : Further, when we weep, the evil that saddens us is present to the imagination. But the image of that which saddens us increases sorrow, just as the image of a pleasant thing adds to joy. Therefore it seems that tears do not assuage sorrow.