Thomas Aquinas

Of compassion: there are two things; in goods, desolation, the effect of which is famine; in persons, destruction, the end of which is the killing sword: such as are for the sword, to the sword (Jer 15:2); and of comfort, who shall comfort you? There is none to comfort her among all them that were dear to her (Lam 1:2); I saw the oppressions that are done under the sun, and the tears of the innocent, and they had no comforter (Eccl 4:1).

Commentary on Isaiah ↗