A good work of art, even a great one, speaks to people of a certain time.
However, a work of genius transcends temporal bounds. It is continuously rediscovered anew by successive generations. In other words, a work of genius isn’t static. It bends (and is bent by) each new audience that encounters it.
For example, the art of the Greeks and the Egyptians, is not art of the past. One could even argue that it is more alive today than ever before. As Pablo Picasso once said, “There is no past or future in art. If a work of art cannot live always in the present, it must not be considered art at all.”
Works of genius live in the now.