Salmos 118
Ambrose of Milan · Comentário Patrístico (catena)
Salmos 118:16
And there are some who suppose that God is fashioned after a bodily manner, when they read of his hand or finger, and they do not observe that these things are written not because of any fashion of a body, since in the godhead there are neither members nor parts, but they are expressions of the oneness of the godhead, that we may believe that it is impossible for either the Son or the Holy Spirit to be separated from God the Father; since the fullness of the godhead dwells as it were bodily in the substance of the Trinity. For this reason, then, is the Son also called the right hand of the Father, as we read: "The right hand of the Lord has done mighty things, the right hand of the Lord has exalted me." — On the Holy Spirit 2.7.69
Salmos 118:24-25
We must keep the law regarding Easter in such a way that we do not observe the fourteenth as the day of the resurrection; that day or one very close to it is the day of the passion, because the feast of the resurrection is kept on the Lord's day. Moreover, we cannot fast on the Lord's day; fasting on this day is what we criticize in the Manichaeans. One shows disbelief in the resurrection of Christ if he proposes a law that we fast on the day of the resurrection, since the law says that the Passover should be eaten with bitterness, that is, with sorrow because the author of our salvation was slain by humanity's great sacrilege. On the Lord's day the prophet bids us rejoice, saying, "This is the day that the Lord has made; let us be glad and rejoice at it." — Letter 36