A stone, and more easily a flower or a bird, could show you the way back to god, to the source, to yourself.
I've been rereading the book recently and have realised that, this is exactly what art does for me. The act of drawing/painting/creating forces me to truly see the essence & existence by taking me away from the labels (a wing, a feather, a petal, a rock) and just experiencing the object I am drawing.
No wonder it makes me feel so good. No wonder I can't stop doing it.