If you were to bring an aboregenie, who had never seen anything of the modern world, out of the most primitive areas of Africa, into a modern day city, with all the modern cars, buildings, electronic gadges, etc. what would his experience be like? What would he think? He wouldn't be able to understand the language, and would have no way to relate to people in this society. In the same way, if you were to bring someone here from two thousand years ago, what would his experience be like? If he were to see cars and trains and TV's, and rocket ships that went to the moon, what would he think? How would he describe it to those at home?
If you want people to understand you, you would use examples and illustrations from their language and ideas from their own culture to share your ideas with them. It would be pointless to try to describe a jumbo jet (telling about jet propulsion, pilots, landing gear, etc) to a primitive person who had never seen any modern..... So, it would seem that to try to describe the using things they knew about.
Imagine these same primitive people trying to describe these objects to their friends and others in their tribe. They might describe the jet as a huge bird. They might describe a train with a huge snake. A primitive people would not have the words in their language to describe what they say in our culture. (Now think about the book of Revelations.)
If you were very ill, would you want a physician of 2000 years ago (such as Luke) to treat you, or would you go to your family doctor? Do you have more faith in modern day medicine over the medicine of 2000 years ago? That could probably be debated and come up with a wide variety of answers. Irregardless, there is an abundance of knowledge about an innumerable amount of subjects that wasn't available 2000 years ago.
Some things haven't change: Telling the truth is still telling the truth. Telling a lie is still telling a lie. Working hard, living with honor and integrity, being humble and compassionate while you serve others is still valid, although the methods may have changed.