...Well, there's the Tree of Life, of course.
But that’s only one kind of tree in a fucking forest of trees. As the aforementioned gentleman points out in the Forword to his memoirs; Oaks are not the Only Trees. Trees are indigenous. You can read about them in books, see them in arboretums; but you can’t really know what they are all about unless you experience them in the context of their own environment.
To cut a long story short: