ISB ~ Luke 1 v2

delivered to us:Luke is probably a second-generation Christian. His work is heavily indebted to the testimony of eyewitnesses and ministers of the gospel in the early Church.

Three points follow from this:(1) Luke is a careful historian who has sifted relevant sources to obtain accurate information; (2) he transmits, not private opinions, but apostolic traditions; and (3) he writes to strengthen the faith of fellow Christians.