a In his Gospel, Luke addresses this man as “most excellent Theophilus,” suggesting to some that Theophilus might have been a prominent person who was not yet a believer. (Luke 1:3) Here in Acts, however, Luke addresses him simply with the words, “O Theophilus.” Some scholars suggest that Theophilus became a believer after reading Luke’s Gospel; hence, they say, Luke leaves out the honorific address and writes to the man as a spiritual brother.