Complex sentence: Historically, and in poetic or rhetorical speech, vocative phrases in English were prefaced by the word "O", as is often seen in the King James Version of the Bible: "O ye of little faith" (in Matthew 8:26).
Split into simpler sentences: Historically, and in poetic or rhetorical speech, vocative phrases in English were prefaced by the word "O". This is often seen in the King James Version of the Bible: for example, "O ye of little faith" (in Matthew 8:26).