“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,”
King James Version (KJV)
Matthew Henry's Concise Commentary
1:1-4 Luke will not write of things about which Christians may safely differ from one another, and hesitate within themselves; but the things which are, and ought to be surely believed. The doctrine of Christ is what the wisest and best of men have ventured their souls upon with confidence and satisfaction. And the great events whereon our hopes depend, have been recorded by those who were from the beginning eye-witnesses and ministers of the word, and who were perfected in their understanding of them through Divine inspiration.
“But this is that which was spoken by the prophet Joel;”