The poem was really not meant to be sad. It is about a conversation between two people who do not understand each other very well. They find a way to reconcile their differences. (Sorry about not writing it very understandably)
I think every individual in the world has there own personal beliefs and no two people are exactly the same. If they were there could be no free will. It is our differences that are beautiful to see, yet this can lead to misunderstandings. No two flowers are exactly the same either. I hope you understand and are not sad.
Yes it is true @lightsplasher ..
Although different we must understand each other and accept each other.