Library Eusebius of Caesarea Life of Constantine
Book 1, Chapter 42: The Honors Conferred upon Bishops, and the Building of Churches.
The emperor also personally inviting the society of God's ministers, distinguished them with the highest possible respect and honor, showing them favor in deed and word as persons consecrated to the service of his God. Accordingly, they were admitted to his table, though mean in their attire and outward appearance; yet not so in his estimation, since he thought he saw not the man as seen by the vulgar eye, but the God in him. He made them also his companions in travel, believing that He whose servants they were would thus help him. Besides this, he gave from his own private resources costly benefactions to the churches of God, both enlarging and heightening the sacred edifices, and embellishing the august sanctuaries of the church with abundant offerings.
English translation by Ernest Cushing Richardson, in Nicene and Post-Nicene Fathers, Series II, Vol. I (eds. Philip Schaff and Henry Wace; Buffalo: Christian Literature Publishing Co., 1890). Public domain. Digital text via New Advent Church Fathers.