(I'm sorry dear teacher lisa, while I have been writing the topic, I realized what I want to saying is "Why should we think positively?". I apologize my snap decision. I'll write it with more consideration. Thank you.)

As human beings, there is no difference between the rich and poor.
All human beings should be respected regardless.
People who are not respected, rich or poor, regardless of the environment. (This does not seem to be a complete sentence.)
So whether it's low income or high income, I can just say the difference. (I'm not sure what you're trying to say here.)
It doesn't fit what I want to say and the topic, so I'll come back with a new topic.