When we look at the plants and trees around us, we see that their branches are covered in large numbers of leaves and in season, flowers. Looking at them from a distance, we might imagine that these branches and leaves are arranged haphazardly, at random. The fact is, however, that where the branches emerge from the stem or trunk, the sequence of the leaves on those branches and even the symmetric shapes of flowers are all established beforehand by means of fixed laws and miraculous measures. Plants have been implementing these laws to the letter ever since the day they were first created. In other words, no leaf or flower comes into being by coincidence.