This verse, taken in context, seems to be speaking generationally. Just as you and I know nothing of the situation, personalities, or daily life of our ancestors from thousands of years ago, so (if the Lord tarries) our generations hence will know (and care) little about our current lives. 

In this Q&A session, Randy Alcorn answered many questions about his book Heaven. In this clip, he talks about the book of Ecclesiates and animals. 

In 2004, Randy Alcorn spoke at the Big Change event in Irving, Texas, on the subject of money and giving. For more information, see his book The Treasure Principle. In this clip, Randy talks about the danger of chasing money, possessions and things other than God.