The Travelers and The Tree

Two Travelers, worn out by the heat of the summer’s sun lay down at noon under the wide-spreading branches of a plane-tree. As they rested under its cool shade, one of the travelers said to the other:
“What a useless tree this is! It bears no fruits, and is not of the slightest use to man,”
The plane-tree interrupting him, said;
“You ungrateful fellows! Do you, while resting under my shade, dare to describe me as useless and unprofitable?”
                           
This story teaches you that
“Some men do not recognise their best blessings”