Basil of Caesarea

There should also be certain bones of the inner person in which the bond of union and harmony of spiritual powers is collected. Just as the bones by their own firmness protect the tenderness of the flesh, so also in the church there are some who through their own constancy are able to carry the infirmities of the weak. And as the bones are joined to each other through articulations by sinews and fastenings that have grown on them, so also would be the bond of charity and peace, which achieves a certain natural junction and union of the spiritual bones in the church of God.