I answer that, When one is in pain, it is natural that the sympathy of a friend should afford consolation: whereof the Philosopher indicates a twofold reason (Ethic. ix, 11). The first is because, since sorrow has a depressing effect, it is like a weight whereof we strive to unburden ourselves: so that when a man sees others saddened by his own sorrow, it seems as though others were bearing the burden with him, striving, as it were, to lessen its weight; wherefore the load of sorrow becomes lighter for him: something like what occurs in the carrying of bodily burdens. The second and better reason is because when a man's friends condole with him, he sees that he is loved by them, and this affords him pleasure, as stated above (Question [32], Article [5]). Consequently, since every pleasure assuages sorrow, as stated above (Article [1]), it follows that sorrow is mitigated by a sympathizing friend.