In academia, it can be extremely refreshing when one realizes how much insight can be gained from literature which is decades old. When it comes to more general non-academic insights, the same holds for material written centuries ago.
Here is a segment of an old (and admittedly very famous) Chinese poem. The Japanese kundoku is due to Tomoyoshi Ikkai in his fantastic 1998 book entitled Kanshi Nyumon.
Despite the passage of many centuries and innumerable technological innovations, it seems the core concerns of mankind have changed very little, a reassuring thought.