The thorns remind one of how success and happiness can be evasive and thus not to feel disappointed and disheartened rather remember that the pain of thorns is short-lived, and the beauty of life would soon overcome the prick of thorns.
Smiling is contagious. We all have our own battles to fight. Each one of us! And sometimes all a person needs is a smile to reassure them that everything will be OKAY (because it will be). Maybe one smile can reassure that girl who sits beside you in the class, that someone sees her - that someone actually cares. Maybe one smile to a stranger you walk by in town today is all it will take to turn that rainy cloud hanging over him into a bright shining sun.