Cyprian, on Ps 117:22

“The stone which the builders rejected; the same is become the head of the corner.”

“Likewise at the setting of the sun and at the end of the day necessarily there must again be prayer. For since Christ is the true Sun and the true Day, as the sun and the day of the world recede, when we pray and petition that the light come on us again, we pray for the coming of Christ to provide us with the grace of eternal light. Moreover, the Holy Spirit in the Psalms declares that Christ is called the Day. He says, "The stone that the builders rejected has become the cornerstone. This is the Lord's doing; it is wonderful in our eyes. This is the day that the Lord has made; let us exalt and rejoice therein." Malachi the prophet also testifies that he is called the Sun when he says, "But to you who fear my name, the Sun of justice shall arise with healing in his wings." But if in holy Scripture Christ is the true Sun and the true Day, no hour is appointed for Christians, by whom God should be adored frequently and always, so that we who are in Christ, that is, in the true Sun and in the true Day, should be insistent throughout the whole day in our petitions and should pray. When, by the law of nature, the revolving night, recurring in its alternating cycle, follows the day, there can be no harm from the darkness for those who pray, because to the sons of light even in the night there is day. For when is he without light who has light in his heart? Or when does he not have sun and day, to whom Christ is Sun and Day?”

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