Eusebius of Caesarea
Catena Aurea · Lukasevangelium 1
Lk 1, Verses 1–4English original
Forasmuch as many have taken in hand to set forth in order a declaration of those things which are most surely believed among us, Even as they delivered them unto us, which from the beginning were eyewitnesses, and ministers of the word: It seemed good to me also, having had perfect understanding of all things from the very first, to write unto thee in order, most excellent Theophilus, That thou mightest know the certainty of those things, wherein thou hast been instructed.
(sup.) Luke is a sure witness, because he obtained his knowledge of the truth either from St. Paul’s instructions, or the instructions and traditions of the other Apostles, who were themselves eyewitnesses from the beginning.