Festal.
Ecclesiastical History, Dialogues, and Letters · Blessed Theodoret of Cyrus
When the Master underwent the Passion of salvation for the sake of mankind, the company of the sacred Apostles was much disheartened, for they knew not clearly what was to be the Passion’s fruit. But when they knew the salvation that grew therefrom, they called the proclamation of the Passion glad tidings, and eagerly offered it to all mankind. And they that believed, as being enlightened in mind, cheerfully received it, and keep the Feast in memory of the Passion, and make the moment of death an opportunity for entertainment and festivity. For the close connexion with it of the resurrection does away with the sadness of death, and becomes a pledge for the resurrection of all. After just now taking part in this celebration, we send you these tidings of the feast as though they were some fragrant perfume, and salute your piety.
Theo 7.64.2