This essay does not have a stated thesis. What is Diaz's main idea? Write a sentence that could serve as a thesis statement. Where in the essay could this be added? should such a sentence be added? Why or why not?

This essay does not have a stated thesis. What is Diaz's main idea? Write a sentence that could serve as a thesis statement. Where in the essay could this sentence be added? Should such a sentence be added? Why or why not? I believe Diaz's main idea is, be careful who you trust. I believe the thesis statement should be "It's hard to trust someone". This should be added in the introduction. It is important that this is added because a thesis is the center of an essay. It should also be added because every paragraph in the body would support this statement.