"In the history of men's love for God or for God's creatures there comes one hour of divine uplifting when a symbol must stand for the unspoken word. That symbol is ever a flower. There is a path of flowers through all science. In order that each flower of my little story book should not masquerade in vain meaningless garments or sing to empty words, I have sought the help of many wiser than I in this knowledge born of sympathy with nature. So this little book is not entirely a fairy-tale."