It's time to say goodbye, but I think goodbyes are sad and I'd much rather say hello. Hello to a new adventure.
The industrial revolution has tended to produce everywhere great urban masses that seem to be increasingly careless of ethical standards.
It's a question of spreading the available energy, aerobic and anaerobic, evenly over four minutes. If you run one part too fast, you pay a price. If you run another part more slowly your overall time is slower.

