Ambrose of Milan, on Gen 37:3

“Now Israel loved Joseph above all his sons, because he had him in his old age: and he made him a coat of divers colours.”

“And so we are taught the proper nature of parental love and filial gratitude. It is pleasant to love one's children and very pleasant to love them exceedingly, but often even parental love does harm to the children unless it is practiced with restraint; for it may give the beloved child free rein out of excessive indulgence or, by preference shown to one child, may alienate the others from the spirit of brotherly love. That son gains more who gains the love of his brothers. This is a more splendid manifestation of generosity on the part of the parents and a richer inheritance for the sons. Let the children be joined in a like favor, who have been joined in a like nature.…What wonder if quarrels arise among brothers over an estate or a house, when enmity blazed up among the sons of holy Jacob over a tunic? What then? Should we find fault with Jacob because he preferred the one son to the others? But we cannot take from parents their freedom to love the more those children whom they believe to be the more deserving, nor ought we to cut off the sons from their eager desire to be the more pleasing. To be sure, Jacob loved the more that son in whom he foresaw the greater marks of virtue; thus he would not appear to have shown preference so much as father to son but rather as prophet to a sacred sign. And Jacob was right to make for his son a tunic of many colors, to indicate by it that Joseph was to be preferred to his brothers with his clothing of manifold virtues.”

Imported from an open dataset — not yet checked against the printed edition.