But the Father said, etc. - The son has not said all he purposed, not so much, because the father’s demonstrations had rekindled the filial, and swallowed up all servile feeling [Trench] (on the word “Father,” see on Luk 15:18), but because the father’s heart is made to appear too full to listen, at that moment, to more in this strain.
the best robe - Compare Zec 3:4, Zec 3:5, “Take away the filthy garments from him; behold I have clothed thee with change of raiment; and they clothed him with garments” (Isa 61:10; Rev 3:18).
a ring - (Compare Gen 41:42; Jam 2:2).
shoes - Slaves went barefoot. Thus, we have here a threefold symbol of freedom and honor, restored, as the fruit of perfect reconciliation.