Something I read about sugar maples in An Eclectic Guide to Trees East of the Rockies by Glen Blouin:
Under the forest canopy, seeds germinate with as little as 2% sunlight, frequently carpeting the forest floor with seedlings. Some die because they have landed on a poor microsite; others are nibbled by mice, rabbits, and deer; but many survive, growing very slowly but otherwise healthy, patiently waiting for a clearing above so they can take advantage of the sunlight. When an older tree dies or is cut down, young maples seize the opportunity to fill the void.
To me this is about adversity, perserverance, and hope. The maple seedling does not give up. It does not get indignant that it faces adversity. It simply grows to the best of its ability, and waits for way to open.