Luke 1 v1-4 introduces Luke's orderly first-hand account of what God accomplished through Jesus, a complied narrative that would allow readers to be certain concerning the truth of the things taught in the Gospels.

Luke 1:1–4

Dedication to Theophilus

1:1 Inasmuch as many have undertaken to compile a narrative of the things that have been accomplished among us, 2 just as those who from the beginning were eyewitnesses and ministers of the word have delivered them to us, 3 it seemed good to me also, having followed all things closely for some time past, to write an orderly account for you, most excellent Theophilus, 4 that you may have certainty concerning the things you have been taught.

(ESV)