Answer:
The difficulties that nature presents was what made man insensitive to the beauty of it.
Step-by-step explanation:
The poem shows how nature builds organisms within the challenges and difficulties they have to face in order to grow. These challenges are not easy, but it allows organisms to live and develop in a strong and edematous manner. However, these difficulties and challenges that nature poses, make people insensitive to their beauty and worry only about what they will face.