From Letter XXVIII 4527 .—(For 356.)
…In order that while He might become a sacrifice for us all, we, nourished up in the words of truth, and partaking of His living doctrine, might be able with the saints to receive also the joy of Heaven. For thither, as He called the disciples to the upper chamber, so does the Word call us with them to the divine and incorruptible banquet; having suffered for us here, but there, preparing the heavenly tabernacles for those who most readily hearken to the summons, and unceasingly, and [gazing] at the goal, pursue the prize of their high calling; where for them who come to the banquet, and strive with those who hinder them, there is laid up both a crown, and incorruptible joy. For even though, humanly speaking, the labour of such a journey is great, yet the Saviour Himself has rendered even it light and kindly.
From Cosmas, see Migne xxvi. p. 1433.