We can find Christ partly in all until he has been made all in all

... [H]e must not seek all the kinds of virtue from one person, however outstanding he may be. For there is one who is adorned with the flowers of knowledge, another who is more strongly fortified by the practice of discretion, another who is solidly founded in patience, one who excels in the virtue of humility and another in that of abstinence, while still another is decked with the grace of simplicity, this one surpasses the others by his zeal for magnanimity, that one by mercy, another one by vigils, yet another by silence, and still another by toil. Therefore the monk who, like a most prudent bee, is desirous of storing up spiritual honey must suck the flower of a particular virtue from those who possess it more intimately, and he must lay it up carefully in the vessel of his heart. He must not begrudge a person for what he has less of, but he must complete and eagerly gather up only the virtuousness that he possesses. For if we want to obtain all of them from a single individual, either examples will be hard to find or, indeed, there will be none that would be suitable for us to imitate. The reason for this is that, although we see Christ has not yet been made "all in all" (to cite the words of the Apostle), we can nonetheless in this fashion find him partly in all.... Christ is now divided among each of the holy ones, member by member. But when all are assembled together in the unity of faith and virtue, he appears as "the perfect man," completing the fullness of his body in the joining together and in the characteristics of the individual members.

St. John Cassian, The Institutes, trans. Boniface Ramsey, Ancient Christian Writers, no. 58 (New York: Newman Press, 2000), 118–119.