I learned to garden and about the trees and plants in our woods from my mother some 70 years ago. So when I am weeding, I still remember. "Just pretend they are German's" --- we were at war with Germany at the time, so weeding was one way to save the world from Hitler's encroachment in my mind. And when I weed, prune, and plant in my yard my mother is with me still.
Gardens not only connect us with nature, but also with the spirits of those who have gone before us.