Craig Mod, from his newsletter:

Folks mistakenly think only new walks are good walks. But the best walks are rewalks. This is obvious once you’ve completed a few. Having walked a path once, you have seen almost nothing. You have looked too frequently at the map, or worried about direction, campsite location, inn coordinates, et cetera et cetera. You may find cool stuff the first time around, but experience shows you’ll find weird stuff the second.