The Certainty of those things herein thou hast been Instructed: Attacks against the Faith in Jesus

It is also the testimony of faith of the human party involved. God operates on the basis of faith of those who become co-protagonists of Revelation. It is not only the wondrous work of the Creator; it is also the intervention of those who have decided to be righteous. In the account of the angel Gabriel's manifestation to Zechariah, Luke emphasizes above all the value of the decision of Zechariah and his wife to remain righteous before the Lord, a decision that according to the same account, not everyone in the people live according to this character:

Luke’s First Treatise to Theophilus and the Purpose of his Writing

The first treatise is not a writing parallel to the other Gospels, despite the parity of the accounts between them, because unlike the others it was not written in order to leave testimony of the acts of Jesus but to validate the truth of the things in which they were both taught, the writer and the recipient, by those who from the beginning were eyewitnesses, and ministers of the word.