This is one of my favorite poems and sounds very much like something a Zen master would say. It reminds me of the teaching to be in the present moment and try to be the best you can be in that moment and not to worry too much about what will come:"Yes if you can't be a pine on the hill, be a shrub in the valley, but be the best little shrub on the side of the road - be a bush if you can't be a tree.If you can't be a highway be a trail.If you can't be a sun be a star.It isn't by size that you win...
