Even the wisdom of the wisest depends on the accumulated wisdom of the past!
Snow cleaning of the world's largest telescope mirrors was an impressive sight. The optics technicians would climb into a huge telescopic boom lift and spray immense clouds of cold carbon dioxide snow and gas onto the ten meter diameter mirrors high above the floor indoors. It would cause some of the accumulated dirt to magically fall off, leaving it less dirty.
Do you know who your grand grand grand grand grand father is? Probably you don’t! If you want to know your very distant past, just look at yourself because you are the accumulated past, you are the ancient river coming from the valleys of the far past!