The great difference is that man has the power of sympathizing. He it is who can say, "My mother has taken care of me; now she is old; I must listen to her; I must tolerate her hard words; perhaps she has only misunderstood. I was very disagreeable at one time, and yet my mother was always patient and kind and attentive through it all." If one's father has become old, if our friends are in difficulty, in every case we must have sympathy. Not like the animals who bite their aged ones, and forget their mothers and fathers when their own needs are satisfied, but like him who thinks gratefully of his aged mother and of the wife to whom he is united to share in sorrows and joys, and to find in what way they are able to serve one another.