Compassion is an inward movement of the heart, stirred by pity for the bodily and ghostly griefs of all men. This compassion makes a man suffer with Christ in His passion… Compassion makes a man look into himself, and recognize his faults, his feebleness in virtues and in the worship of God, his lukewarmness, his laziness, his many failings, the time he has wasted and his present imperfection in moral and other virtues; all this makes a man feel true pity and compassion for himself. Further, compassion marks the errors and disorders of our fellow-creatures, how little they care for their God and their eternal blessedness, their ingratitude for all the good things which God has done for them, and the pains He suffered for their sake; how they are strangers to virtue, unskilled and unpracticed in it, but skillful and cunning in every wickedness; how attentive they are to the loss and gain of earthly goods, how careless and reckless they are of God, of eternal things, and their eternal bliss. When he marks this, a good man is moved to compassion for the salvation of all men.Such a man will also regard with pity the bodily needs of his neighbors, and the manifold sufferings of human nature; seeing men hungry, thirsty, cold, naked, sick, poor, and abject; the manifold oppressions of the poor, the grief caused by loss of kinsmen, friends, goods, honor, peace; all the countless sorrows which befall the nature of man.
–Blessed John Ruysbroeck (1293-1381)