Final answer:
Luke was a Greek-speaking individual who was well-educated and possessed a keen mind. Greek language and culture had a significant influence on the Roman Empire, and knowledge of Greek was highly valued among the elite.
Step-by-step explanation:
Luke was a Greek-speaking individual who was well-educated and possessed a keen mind. Greek language and culture had a significant influence on the Roman Empire, and knowledge of Greek was highly valued among the elite. Greek was the official language of the state and the language of the church, and many important works, including the New Testament, were written in Greek.