Tempus fugit

The other day, I was listening to a song from the band Yes. The song was very unorthodox but eventually conveyed the motto "time flies". The motto tempus fugit has been consistently used throughout history but was originally written by Virgil the author of the Aeneid. The term refers to the speed at which time moves when not being paid attention too. The American equivalent would be the saying"time flies when your having fun."
Virgil(below)